Listed below are 3658 taxa included on NameThatPlant.net as of 10/23/18, using nomenclature preferred by the online PLANTS National Database. A plus sign indicates that the PLANTS National Database further divides that species into varieties or subspecies. Click the scientific name to link to information and (maybe) pictures!
Abelia Xgrandiflora [chinensis X uniflora] — Abelia
Abelmoschus esculentus — Okra, Gumbo
Abies alba — European Fir, Silver Fir
Abies balsamea — Balsam Fir, Northern Balsam, Canada Balsam
Abies fraseri — Fraser Fir, She Balsam, Southern Balsam
Abutilon theophrasti — Velvetleaf, Indian Mallow, Butterprint
Acalypha gracilens — Slender Three-seeded Mercury, Slender Copperleaf, Short-stalked Copperleaf
Acalypha ostryifolia — Rough-pod Copperleaf, Hophornbeam Copperleaf
Acalypha rhomboidea — Common Three-seeded Mercury, Rhombic Copperleaf
Acalypha setosa — Cuban Copperleaf
Acalypha virginica — Three-seeded Mercury, Virginia Copperleaf, Short-stalked Copperleaf
Acer barbatum — Southern Sugar Maple, Florida Maple
Acer buergerianum — Trident Maple
Acer ginnala — Amur Maple
Acer leucoderme — Chalk Maple, Small Chalk Maple, White-bark Maple
Acer negundo var. negundo — Eastern Box Elder, Ash-leaved Maple
Acer nigrum — Black Maple
Acer palmatum — Japanese Maple
Acer pensylvanicum — Striped Maple, Moosewood
Acer platanoides — Norway Maple
Acer pseudoplatanus — Sycamore Maple, Planetree Maple
Acer rubrum var. rubrum — Eastern Red Maple
Acer rubrum var. trilobum — Carolina Red Maple, Trident Red Maple
Acer saccharinum — Silver Maple, Soft Maple
Acer saccharum var. saccharum — Sugar Maple, Hard Maple, Sugar Tree
Acer spicatum — Mountain Maple
Achillea millefolium var. millefolium — Yarrow, Thousandleaf
Achillea millefolium var. occidentalis — American Yarrow, American Thousandleaf
Achyranthes japonica var. hachijoensis — Japanese Chaff-flower
Acmella oppositifolia var. repens — Spilanthes, Creeping Spotflower
Aconitum reclinatum — Trailing Wolfsbane, White Monkshood, White Aconite
Aconitum uncinatum + — Appalachian Blue Monkshood, Eastern Blue Monkshood
Acorus americanus — Sweetflag, American Calamus
Acorus calamus — Sweetflag, European Calamus
Acroptilon repens — Russian Knapweed
Actaea pachypoda — Doll's-eyes, White Baneberry, White Cohosh
Actaea podocarpa — Mountain Black Cohosh, American Cohosh, Late Black Cohosh
Actaea racemosa + — Common Black Cohosh, Early Black Cohosh, Black Snakeroot
Adiantum capillus-veneris — Southern Maidenhair Fern, Venus-hair Fern
Adiantum pedatum — Northern Maidenhair Fern
Adlumia fungosa — Climbing Fumitory, Allegheny Vine, Cliff-Harlequin
Aegopodium podagraria — Goutweed, Bishop's Weed
Aesculus flava — Yellow Buckeye
Aesculus glabra var. glabra — Ohio Buckeye, Fetid Buckeye
Aesculus hippocastanum — Horsechestnut
Aesculus parviflora — Bottlebrush Buckeye
Aesculus pavia var. pavia — Red Buckeye
Aesculus sylvatica — Painted Buckeye
Agalinis aphylla — Scale-leaf Gerardia, Scale-leaf Agalinis
Agalinis fasciculata — Gerardia, beach false foxglove
Agalinis fasciculata — Gerardia, beach false foxglove
Agalinis linifolia — Gerardia, flaxleaf false foxglove
Agalinis maritima + — Seaside Gerardia
Agalinis obtusifolia — Ten-lobe False Foxglove, Gerardia
Agalinis purpurea — Purple Gerardia, purple false foxglove
Agalinis setacea — Sandhills Gerardia, Threadleaf Gerardia, threadleaf false foxglove
Agalinis tenuifolia var. tenuifolia — Slender Gerardia, Thin-leaved Agalinis, slenderleaf false foxglove
Agarista populifolia — Tall Fetterbush, Florida Leucothoe, Agarista, Pipe-plant
Agastache nepetoides — Yellow Giant-hyssop
Agastache scrophulariifolia — Purple Giant-hyssop
Ageratina altissima var. altissima — Common White Snakeroot, Common Milk-poison
Ageratina altissima var. roanensis — Appalachian White Snakeroot, Appalachian Milk-poison
Ageratina aromatica var. aromatica — Small-leaved White Snakeroot, Aromatic Snakeroot, Wild-hoarhound, Small White Snakeroot
Ageratum houstonianum — Ageratum
Agrimonia gryposepala — Common Agrimony
Agrimonia incisa — Pineland Agrimony
Agrimonia microcarpa — Low Agrimony, Small-fruited Agrimony
Agrimonia parviflora — Southern Agrimony, Small-flowered Agrimony, Harvestlice
Agrimonia pubescens — Downy Agrimony
Agrimonia rostellata — Woodland Agrimony
Agrimonia striata — Roadside Agrimony
Agrostemma githago — Corncockle, Purple Cockle, Corn-campion
Agrostis capillaris — Rhode Island Bentgrass, Colonial Bentgrass, Browntop
Agrostis elliottiana — Elliott's Bentgrass, Southern Bentgrass
Agrostis gigantea — Black Bentgrass, Redtop
Agrostis perennans — Autumn Bentgrass, Upland Bent
Agrostis perennans — Coastal Bog Bentgrass
Agrostis stolonifera — Creeping Bentgrass
Ailanthus altissima — Ailanthus, Tree-of-heaven
Aira elegans — Elegant Hairgrass
Ajuga reptans — Carpet Bugle, Bugle-weed
Akebia quinata — Five-leaf Akebia, Chocolate-vine
Albizia julibrissin — Mimosa, Silktree
Alcea rosea — Hollyhock
Aldrovanda vesiculosa — Waterwheel-plant
Aletris aurea — Golden Colic-root
Aletris farinosa — Northern White Colic-root, White-star Grass, Stargrass, Mealy Colicroot
Aletris lutea — Yellow Colic-root
Aletris obovata — Southern White Colic-root
Alisma subcordatum — Southern Water-plantain
Alliaria petiolata — Garlic Mustard, Hedge Garlic
Allium ampeloprasum — Wild Leek, Yorktown Onion
Allium canadense var. canadense — Wild Onion
Allium canadense var. mobilense — Wild Onion
Allium cernuum var. cernuum — Nodding Onion, Nodding Wild Onion
Allium cuthbertii — Cuthbert's Onion
Allium cuthbertii — Keever‚Äôs Onion, Brushy Mountain Onion
Allium sativum — Garlic
Allium speculae — Flatrock Onion
Allium stellatum — Glade Onion, Prairie Onion
Allium tricoccum — Ramps, Red Ramps, Rampscallions, Wild Leek
Allium vineale ssp. vineale — Field Garlic, Wild Onion, Crow Garlic, Onion Grass
Alnus glutinosa — Black Alder, European Alder
Alnus incana ssp. rugosa — Speckled Alder
Alnus maritima — Georgia Alder
Alnus serrulata — Tag Alder, Hazel Alder, Smooth Alder
Alnus viridis ssp. crispa — Green Alder, Mountain Alder
Alopecurus carolinianus — Carolina Foxtail Grass
Alternanthera philoxeroides — Alligator-weed
Alternanthera sessilis — Sessile Joyweed
Alysicarpus vaginalis — Alyce Clover
Amaranthus australis — Southern Water-hemp, Careless
Amaranthus hybridus — Smooth Pigweed, Smooth Amaranth, Green Amaranth, Hybrid Amaranth
Amaranthus polygonoides — Tropical Amaranth, Smartweed Amaranth
Amaranthus pumilus — Seabeach Amaranth, Dwarf Amaranth
Amaranthus spinosus — Spiny Amaranth
Ambrosia artemisiifolia + — Annual Ragweed, Common Ragweed
Ambrosia trifida var. trifida — Giant Ragweed, Great Ragweed
Amelanchier arborea var. arborea — Downy Serviceberry, Sarvisberry
Amelanchier canadensis — Eastern Serviceberry, Canadian Serviceberry
Amelanchier laevis — Allegheny Serviceberry, Smooth Serviceberry
Amelanchier obovalis — Coastal Plain Serviceberry, Pocosin Shadbush
Amelanchier sanguinea var. sanguinea — Roundleaf Serviceberry, New England Serviceberry
Amelanchier stolonifera — Running Serviceberry, Dwarf Serviceberry
Amianthium muscitoxicum — Fly-poison
Ammannia coccinea — Red Toothcup, valley redstem
Amorpha fruticosa — False Indigo, Tall Indigo-bush
Amorpha georgiana var. confusa — Savanna Indigo-bush
Amorpha georgiana var. georgiana — Georgia Indigo-bush
Amorpha glabra — Mountain Indigo-bush, Appalachian Indigo-bush, Mountain Indigo, Mountain False Indigo
Amorpha herbacea var. herbacea — Leadplant, Dwarf Indigo-bush
Amorpha schwerinii — Piedmont Indigo-bush
Ampelaster carolinianus — Climbing Aster
Ampelopsis arborea — Peppervine
Ampelopsis brevipedunculata — Porcelain-berry, Amur Peppervine
Ampelopsis cordata — American Ampelopsis, Raccoon-grape, False-grape
Amphianthus pusillus — Pool-sprite, Snorkelwort, Little Amphianthus
Amphicarpaea bracteata + — American Hog-peanut
Amphicarpum purshii — Pinebarrens Peanut-grass, Pinebarrens Goober-grass, New Jersey Goober-grass
Amsonia ciliata var. ciliata — Sandhills Bluestar, Fringed Bluestar
Amsonia illustris — Swamp Bluestar, Ozark Bluestar
Amsonia ludoviciana — Louisiana Bluestar
Amsonia rigida — Stiff Bluestar, Pond Bluestar, Marsh Bluestar
Amsonia tabernaemontana var. tabernaemontana — Wideleaf Bluestar, Blue Dogbane
Anagallis minima — Chaffweed, False-pimpernel
Anaphalis margaritacea — Pearly Everlasting
Andromeda polifolia var. glaucophylla — Bog-rosemary
Andropogon capillipes — Dryland White Bluestem, Chalky Bluestem
Andropogon floridanus — Florida Bluestem
Andropogon gerardii — Big Bluestem, Turkeyfoot
Andropogon glaucopsis — Big Chalky Bluestem, Coastal Bluestem
Andropogon glomeratus var. glomeratus — Common Bushy Bluestem, Bushy Beardgrass, Bog Broomsedge, Clustered Bluestem
Andropogon glomeratus var. hirsutior — Savanna Bushy Bluestem, Hairy Bluestem
Andropogon glomeratus var. pumilus — Maritime Bushy Bluestem, Bushy Beardgrass
Andropogon gyrans var. gyrans — Elliott's Bluestem
Andropogon gyrans var. stenophyllus — Narrow-leaved Bluestem
Andropogon longiberbis — Longbeard Bluestem
Andropogon mohrii — Mohr's Bluestem, Tawny Bluestem, Bog Bluestem
Andropogon ternarius var. ternarius — Splitbeard Bluestem, Silvery Bluestem
Andropogon virginicus var. decipiens — Deceptive Bluestem, Deceptive Broomsedge
Andropogon virginicus var. virginicus — Broomsedge, Broomsedge Bluestem, Old-field Broomstraw, "Sedge Grass"
Anemone berlandieri — Eastern Prairie Anemone, Ten-petal Anemone, Southern Thimbleweed, Glade Windflower
Anemone canadensis — Canada Anemone
Anemone caroliniana — Carolina Anemone, Prairie Anemone
Anemone lancifolia — Mountain Anemone, Lanceleaf Anemone
Anemone quinquefolia var. quinquefolia — Wood Anemone
Anemone virginiana var. virginiana — Thimbleweed, Tall Anemone
Angelica atropurpurea — Purple Angelica
Angelica triquinata — Mountain Angelica, Filmy Angelica, Appalachian Angelica
Angelica venenosa — Hairy Angelica, Downy Angelica, Deadly Angelica
Antennaria howellii ssp. neodioica — Pussytoes
Antennaria neglecta — Field Pussytoes
Antennaria parlinii ssp. fallax — Big-head Pussytoes
Antennaria parlinii ssp. parlinii — Parlin's Pussytoes
Antennaria plantaginifolia — Plantain Pussytoes, Plantain-leaved Pussytoes
Antennaria solitaria — Solitary Pussytoes, Southern Single-head Pussytoes
Anthemis arvensis — Corn Chamomile, Field Chamomile
Anthemis cotula — Stinking Chamomile, Stinking Mayweed, Dog-fennel
Anthoxanthum odoratum ssp. odoratum — Sweet Vernal Grass
Anthriscus caucalis — Bur Chervil, Bur-parsley
Anthriscus cerefolium — Garden Chervil
Anthriscus sylvestris — Cow Chervil, Wild Chervil, Cow-parsley
Antigonon leptopus — Love-chain, Queen's-jewels, Confederate-vine, Corallita
Aphanes microcarpa — Parsley-piert, slender parsley piert
Apios americana — Common Groundnut
Aplectrum hyemale — Puttyroot, Adam-and-Eve
Apocynum androsaemifolium — Spreading Dogbane
Apocynum cannabinum — Indian-hemp, Hemp Dogbane, Marion's Weed
Apocynum Xfloribundum [androsaemifolium X cannabinum] — Dogbane
Aquilegia canadensis — Eastern Columbine, Canada Columbine
Arabidopsis thaliana — Mouse-ear Cress
Arabis canadensis — Sicklepod, Canada Rockcress
Arabis georgiana — Georgia Rockcress
Arabis glabra — Tower Mustard
Arabis laevigata var. burkii — Burk's Smooth Rockcress
Arabis laevigata var. laevigata — Common Smooth Rockcress
Arabis lyrata — Lyreleaf Rockcress, Dwarf Rockcress
Arabis missouriensis — Missouri Rockcress
Arabis patens — Spreading Rockcress
Arachis glabrata — Grassnut
Arachis hypogaea — Peanut
Aralia hispida — Bristly Sarsaparilla
Aralia nudicaulis — Wild Sarsaparilla
Aralia racemosa ssp. racemosa — Spikenard
Aralia spinosa — Devil's Walkingstick, Hercules-club, Prickly Aralia, Prickly-ash
Arctium lappa — Great Burdock
Arctium minus — Common Burdock
Arctostaphylos uva-ursi — Bearberry, Kinnikinick
Ardisia crenata — Coral Ardisia, Hen's Eyes, Coralberry, Marlberry
Ardisia japonica — Japanese Ardisia, Marlberry
Arenaria lanuginosa ssp. lanuginosa var. lanuginosa — Spreading Sandwort
Arenaria serpyllifolia — Large Thyme-leaved Sandwort
Arenaria serpyllifolia — Small Thyme-leaved Sandwort, Slender Sandwort
Arethusa bulbosa — Bog-rose, Dragon's-mouth, Arethusa
Argemone albiflora ssp. albiflora — White Prickly-poppy, Carolina Poppy
Argemone mexicana — Mexican Prickly-poppy, Mexican Poppy
Arisaema dracontium — Green Dragon
Arisaema triphyllum ssp. pusillum — Small Jack in the Pulpit
Arisaema triphyllum ssp. quinatum — Southern Jack in the Pulpit, Preacher John, Prester-John
Arisaema triphyllum ssp. stewardsonii — Bog Jack in the Pulpit, Northern Jack in the Pulpit
Arisaema triphyllum ssp. triphyllum — Common Jack in the Pulpit , Indian Turnip
Arisaema triphyllum ssp. triphyllum — Florida Jack in the Pulpit
Aristida beyrichiana — Southern Wiregrass
Aristida condensata — Big Three-awn
Aristida longespica var. longespica — Southeastern Slim-spike Three-awn
Aristida purpurascens var. purpurascens — Arrowfeather, Arrowfeather Three-awn
Aristida spiciformis — Bottlebrush Three-awn, Spike Three-awn
Aristida stricta — Carolina Wiregrass, Pineland Three-awn
Aristida tuberculosa — Seabeach Needlegrass, Sandhills Three-Awn
Aristolochia macrophylla — Dutchman's Pipe, Pipevine
Aristolochia serpentaria — Turpentine-root, Virginia Snakeroot, Serpent Birthwort
Aristolochia tomentosa — Woolly Pipevine, Woolly Dutchman's Pipe
Arnica acaulis — Leopard's-bane, Southeastern Arnica
Arnoglossum atriplicifolium — Pale Indian Plantain
Arnoglossum diversifolium — Variable-leaf Indian Plantain
Arnoglossum ovatum — Savanna Indian Plantain
Arnoglossum ovatum — Broadleaf Indian Plantain, Ovateleaf Indian Plantain, Ovateleaf Cacalia
Arnoglossum reniforme — Great Indian Plantain
Artemisia ludoviciana ssp. ludoviciana — White Sage, Prairie Sage
Artemisia stelleriana — Beach Wormwood, Dusty Miller, Hoary Mugwort, Oldwoman
Artemisia vulgaris var. vulgaris — Mugwort, Felon Herb
Arthraxon hispidus — Basket Grass, Small Carpgrass
Arum italicum — Italian Arum, Italian Lords and Ladies
Aruncus dioicus var. dioicus — Eastern Goatsbeard, Bride's Feathers
Arundinaria appalachiana — Hill Cane
Arundinaria gigantea — River Cane, Giant Cane
Arundinaria tecta — Switch Cane, Small Cane
Arundo donax — Giant Reed
Asarum canadense — Common Wild Ginger
Asarum canadense — Wild Ginger
Asarum canadense — Wild Ginger
Asclepias amplexicaulis — Clasping Milkweed, Blunt-leaved Milkweed, Wavyleaf Milkweed
Asclepias cinerea — Carolina Milkweed, Walter's Milkweed
Asclepias connivens — Largeflower Milkweed
Asclepias exaltata — Poke Milkweed, Tall Milkweed
Asclepias hirtella — Barrens Milkweed
Asclepias humistrata — Fleshy Milkweed, Pinewoods Milkweed
Asclepias incarnata ssp. pulchra — Eastern Swamp Milkweed
Asclepias lanceolata — Few-flower Milkweed, Red Milkweed
Asclepias longifolia — Longleaf Milkweed, Savanna Milkweed
Asclepias michauxii — Michaux's Milkweed
Asclepias obovata — Pineland Milkweed, Green Milkweed
Asclepias pedicellata — Stalked Milkweed, Savanna Milkweed
Asclepias perennis — Smoothseed Milkweed, Swampforest Milkweed, Swamp Milkweed
Asclepias purpurascens — Purple Milkweed
Asclepias quadrifolia — Four-leaved Milkweed
Asclepias rubra — Purple Savanna Milkweed, Red Milkweed, Bog Milkweed
Asclepias syriaca — Common Milkweed
Asclepias tuberosa ssp. tuberosa — Butterfly Milkweed, Common Butterflyweed, Pleurisy Root, Wind Root
Asclepias variegata — White Milkweed , Red-ring Milkweed
Asclepias verticillata — Whorled Milkweed, Narrowleaf Milkweed
Asclepias viridiflora — Green Milkweed
Asclepias viridis — Green Antelope-horn, Spider Milkweed, Green Milkweed
Asimina incana — Flag Pawpaw, Polecat Bush, Woolly Pawpaw
Asimina parviflora — Small-flowered Pawpaw, Small-fruited Pawpaw, Dwarf Pawpaw
Asimina reticulata — Netleaf Pawpaw
Asimina triloba — Common Pawpaw, Indian-banana
Asparagus aethiopicus — Sprenger‚Äôs Asparagus-fern, Emerald-fern
Asparagus officinalis — Garden Asparagus, Sparrowgrass
Asplenium monanthes — Single-sorus Spleenwort, One-sorus Spleenwort
Asplenium montanum — Mountain Spleenwort
Asplenium pinnatifidum — Lobed Spleenwort
Asplenium platyneuron + — Ebony Spleenwort
Asplenium resiliens — Blackstem Spleenwort
Asplenium rhizophyllum — Walking Fern
Asplenium trichomanes ssp. trichomanes — Maidenhair Spleenwort
Asplenium Xheteroresiliens [heterochroum X resiliens] — Marl Spleenwort, Carolina Spleenwort, Wagner's Spleenwort, Morzenti's Spleenwort
Aster tataricus — Tartarian Aster
Astilbe biternata — Appalachian False Goatsbeard
Astragalus canadensis var. canadensis — Canada Milkvetch
Astragalus michauxii — Sandhills Milkvetch, Michaux's Milkvetch
Astranthium integrifolium ssp. integrifolium — eastern western-daisy
Astrolepis sinuata ssp. sinuata — Wavy Cloak Fern, Wavy Scaly Cloak Fern
Athyrium filix-femina ssp. angustum — Northern Lady Fern
Athyrium filix-femina ssp. asplenioides — Southern Lady Fern
Atriplex prostrata — Thinleaf Orach, Fat-hen
Aucuba japonica — Aucuba, Japanese-laurel, Spotted-laurel
Aureolaria flava var. flava — Smooth False-foxglove, Eastern Smooth Oak-leach
Aureolaria laevigata — Appalachian Oak-leach, Smooth False-foxglove
Aureolaria patula — Cumberland Oak-leach, Spreading Yellow Foxglove
Aureolaria pectinata — Southern Oak-leach, Sticky False-foxglove
Aureolaria pedicularia + — Fern-leaf False-foxglove, Annual Oak-leach
Aureolaria virginica — Downy False-foxglove, Downy Oak-leach, Virginia Oak-leach
Avena sativa — Domestic Oats
Axonopus fissifolius — Common Carpetgrass
Axonopus furcatus — Big Carpetgrass
Azolla caroliniana — Eastern Mosquito Fern, Water Fern
Azolla filiculoides — Large Mosquito Fern
Baccharis angustifolia — False-willow, False Saltwater Willow
Baccharis glomeruliflora — Groundsel Tree
Baccharis halimifolia — Silverling, Groundsel Tree, Consumption Weed, Sea Myrtle
Bacopa caroliniana — Blue Water-hyssop, Sweet Water-hyssop, Carolina Water-hyssop, Lemon Bacopa
Bacopa innominata — Tropical Water-hyssop
Balduina angustifolia — coastal plain honeycomb-head
Balduina atropurpurea — Purple-disk Honeycomb-head, Bog Honeycomb-head, Purple Balduina, Purple Honeycomb-head
Balduina uniflora — Savanna Honeycomb-head, Yellow Balduina
Bambusa vulgaris — Common Bamboo
Baptisia alba var. alba — Thick-pod White Wild Indigo
Baptisia alba var. macrophylla — white wild indigo
Baptisia albescens — Narrow-pod White Wild Indigo, Spiked Wild Indigo
Baptisia arachnifera — Hairy Rattleweed, Hairy Wild Indigo
Baptisia australis var. aberrans — Eastern Prairie Blue Wild Indigo, Glade Wild Indigo
Baptisia australis var. australis — Tall Blue Wild Indigo, Streamside Blue Indigo
Baptisia bracteata var. bracteata — Creamy Wild Indigo
Baptisia bracteata var. leucophaea — longbract wild indigo
Baptisia cinerea — Carolina Wild Indigo
Baptisia lanceolata var. lanceolata — Gopherweed, Lanceleaf Wild Indigo
Baptisia megacarpa — Apalachicola Wild Indigo, Bigpod Wild Indigo
Baptisia nuttalliana — Nuttall's wild indigo
Baptisia perfoliata — Gopherweed, Catbells
Baptisia tinctoria — Horsefly Weed, Yellow Wild Indigo, Yellow False-indigo, Rattleweed
Barbarea verna — Early Winter-cress, Creasy
Barbarea vulgaris — Common Winter-cress, Yellow Rocket, Creasy
Bartonia verna — Spring Bartonia, White Bartonia, White Screwstem
Bartonia virginica — Virginia Bartonia, Yellow Screwstem, Yellow Bartonia, Common Bartonia
Batis maritima — Saltwort, Beachwort, Batis, Turtleweed
Bejaria racemosa — Tarflower, Flycatcher
Belamcanda chinensis — Blackberry-lily
Berberis canadensis — American Barberry, Allegheny Barberry
Berberis julianae — Evergreen Barberry, Wintergreen Barberry
Berberis thunbergii — Japanese Barberry
Berberis vulgaris — European Barberry, Common Barberry
Berchemia scandens — Supplejack, American Rattan, Rattan-vine
Berlandiera pumila var. pumila — Eastern Green-eyes
Betula alleghaniensis var. alleghaniensis — Yellow Birch
Betula lenta — Sweet Birch, Cherry Birch, Black Birch, "Mahogany"
Betula nigra — River Birch, Red Birch
Betula papyrifera var. cordifolia — Mountain Paper Birch
Betula papyrifera var. papyrifera — Canoe Birch, Paper Birch
Betula populifolia — Gray Birch, White Birch
Bidens alba var. radiata — Hairy Beggar-ticks, Shepherd's Needle
Bidens aristosa — Ditch Daisy, Bur-marigold, Ozark Tickseed-sunflower
Bidens aristosa — Ditch Daisy, Bur-marigold, Midwestern Tickseed-sunflower
Bidens bipinnata — Spanish Needles
Bidens cernua — Nodding Bur-marigold
Bidens frondosa — Devil's Beggar-ticks, Annual Beggar's Ticks
Bidens laevis — Showy Bur-marigold, Smooth Beggarticks
Bidens mitis — Coastal Plain Tickseed-sunflower
Bidens pilosa — Hairy Beggar-ticks
Bidens vulgata — Tall Beggar-ticks
Bigelowia nuttallii — Nuttall's Rayless Goldenrod
Bignonia capreolata — Cross-vine
Bischofia javanica — Japanese Bishopwood, Javawood, Toog, Uriam
Blephilia ciliata — Diabase Woodmint, Horsemint, Downy Woodmint
Blephilia hirsuta var. hirsuta — Hairy Woodmint
Boehmeria cylindrica — False Nettle
Boehmeria nivea — Ramie
Boerhavia diffusa — Red Spiderling, Spreading Hogweed
Boerhavia erecta — Erect Spiderling
Boltonia asteroides var. asteroides — Eastern Doll's Daisy, White Doll's Daisy, False Aster, Boltonia
Boltonia caroliniana — Carolina Doll's Daisy, Boltonia
Boltonia diffusa var. diffusa — Southern Doll's Daisy, Boltonia
Bommeria hispida — Copper Fern
Borrichia frutescens — Seaside Oxeye
Botrychium biternatum — Southern Grapefern
Botrychium dissectum — Cutleaf Grapefern, Dissected Grapefern
Botrychium lunarioides — Winter Grapefern
Botrychium matricariifolium — Daisyleaf Moonwort
Botrychium simplex — Least Moonwort
Botrychium virginianum — Rattlesnake Fern, Sang-find
Bouteloua curtipendula var. curtipendula — Side-oats Grama
Bowlesia incana — Hoary Bowlesia
Boykinia aconitifolia — Brook-saxifrage, Eastern Boykinia, Allegheny Brookfoam, Aconite-saxifrage
Brachyelytrum aristosum — Northern Shorthusk
Brachyelytrum erectum — Common Shorthusk
Brasenia schreberi — Water-shield, Purple Wen-dock
Brassica juncea — Mustard Greens, Indian Mustard, Brown Mustard, Chinese Mustard
Brassica napus — Rape, Canola, Rutabaga
Brassica nigra — Black Mustard, Charlock
Brassica rapa var. rapa — Turnip, Field Mustard, Field Rape, Chinese Cabbage
Brickellia cordifolia — Heartleaf Brickellia, Flyr's False-boneset
Brickellia eupatorioides var. eupatorioides — Eastern False-boneset, Eastern False-eupatorium
Bromus arvensis — Japanese Chess
Bromus arvensis — Field Brome
Bromus catharticus — Rescue Grass
Bromus hordeaceus ssp. hordeaceus — Soft Chess, Lopgrass
Bromus inermis ssp. inermis var. inermis — Smooth Brome, Hungarian Brome
Bromus pubescens — Common Eastern Brome, Canada Brome
Bromus racemosus — Smooth Brome
Bromus racemosus — Hairy Chess, Meadow Brome
Bromus secalinus — Cheat, Common Chess, Ryebrome
Bromus sterilis — Poverty Brome, Barren Brome, Cheatgrass
Bromus tectorum — Downy Brome, Downy Chess, Downy Cheat, Cheatgrass
Broussonetia papyrifera — Paper Mulberry
Brunnichia ovata — Buckwheat-vine, Eardrop-vine, Ladies Eardrops, Redvine
Buchnera americana — Savanna Bluehearts, Florida Bluehearts, Buchnera
Buchnera americana — American Bluehearts, Prairie Bluehearts, Plains Bluehearts
Buckleya distichophylla — Buckleya, Piratebush
Buddleja davidii — Orange-eye Butterflybush, Summer-lilac
Buddleja lindleyana — Lindley's Butterflybush
Buglossoides arvensis — Corn Gromwell
Bulbostylis barbata — Old World Hairsedge
Bulbostylis ciliatifolia var. ciliatifolia — Savannah Hairsedge
Bulbostylis ciliatifolia var. coarctata — Elliott's Hairsedge
Bulbostylis stenophylla — sandy field hairsedge
Bulbostylis warei — Ware's Hairsedge
Bupleurum rotundifolium — Hound's-ear, Hare's-ear, Thoroughwax
Burmannia biflora — Violet Burmannia, Blue Burmannia
Butia capitata — Pindo Palm, South American Jelly Palm, Brazilian Butia
Buxus sempervirens — Boxwood, Common Box
Cabomba caroliniana + — Fanwort, Carolina Fanwort
Caesalpinia bonduc — Gray Nicker, Holdback
Cakile edentula ssp. harperi — Southeastern Sea Rocket
Calamagrostis coarctata — Nuttall's Reedgrass
Calamagrostis epigeios ssp. epigeios — Bushgrass, Feathertop
Calamagrostis porteri ssp. porteri — Porter's Reedgrass
Calamintha nepeta ssp. nepeta — Lesser Calamint, Basil-thyme
Callicarpa americana — American Beautyberry, French Mulberry, Beautybush
Callicarpa dichotoma — Chinese Beautyberry, Purple Beautyberry
Callicarpa japonica — Japanese Beautyberry
Callirhoe pedata — Palmleaf Poppy-mallow
Callisia graminea — Grassleaf Roseling, Pink Spiderwort, Slender Roseling
Callisia rosea — Common Roseling
Callitriche heterophylla ssp. heterophylla — Waterstar, Common Water-starwort
Callitriche stagnalis — Pond Water-starwort, European waterstarwort
Calopogon barbatus — Bearded Grass-pink
Calopogon multiflorus — Many-flowered Grass-pink
Calopogon oklahomensis — Oklahoma Grass-pink
Calopogon pallidus — Pale Grass-pink
Calopogon tuberosus var. tuberosus — Common Grass-pink
Caltha palustris var. palustris — Marsh Marigold, Cowslip
Calycanthus floridus var. glaucus — Sweetshrub, Carolina Allspice, Strawberry-shrub, Sweet Bubby-bush
Calycocarpum lyonii — Cupseed, Lyonia-vine
Calyptocarpus vialis — Straggler-daisy, Lawnflower
Calystegia catesbeiana — Blue Ridge Bindweed, Silky Bindweed, Downy False Bindweed
Calystegia catesbeiana — Catesby's Bindweed, Catesby's False Bindweed
Calystegia sepium + — Hedge Bindweed
Calystegia silvatica ssp. fraterniflora — Twin-flowered Bindweed, Short-stalk False Bindweed
Calystegia spithamaea ssp. purshiana — Shale Bindweed
Calystegia spithamaea ssp. spithamaea — Low Bindweed, Upright Bindweed
Camassia scilloides — Wild Hyacinth, Eastern Camas Lily, Quamash Lily
Camellia japonica — Camellia
Camellia sasanqua — Sasanqua, Sasanqua Camellia
Camellia sinensis — Tea
Campanula aparinoides — Marsh Bellflower, Bedstraw Bellflower
Campanula aparinoides — marsh bellflower
Campanula divaricata — Southern Harebell, Appalachian Bellflower
Campanula rapunculoides — European Bellflower, Rampion Bellflower, Rover Bellflower
Campanula rotundifolia — Scotch Harebell, Bluebell, Bluebell-of-Scotland
Campanulastrum americanum — Tall Bellflower
Campsis radicans — Trumpet-creeper, Trumpet Vine, Cow-Itch Vine
Canna flaccida — Golden Canna, Yellow Canna, Indian Shot
Capsella bursa-pastoris — Common Shepherd's Purse
Caragana arborescens — Siberian Pea Shrub
Cardamine angustata — Eastern Slender Toothwort
Cardamine bulbosa — Bulbous Bittercress, Spring Cress
Cardamine clematitis — Clematis-leaved Bittercress, Mountain Bittercress
Cardamine concatenata — Cutleaf Toothwort
Cardamine diphylla — Broadleaf Toothwort, Crinkleroot, Pepperroot
Cardamine dissecta — Dissected Toothwort, Fineleaf Toothwort
Cardamine douglassii — Limestone Bittercress, Douglass's Bittercress, Purple Cress, Pink Spring-cress
Cardamine flagellifera + — Blue Ridge Bittercress
Cardamine flexuosa — Woodland Bittercress
Cardamine hirsuta — Hairy Bittercress
Cardamine impatiens — Narrowleaf Bittercress
Cardamine micranthera — Streambank Bittercress, Small-anthered Bittercress
Cardamine parviflora var. arenicola — Sand Bittercress, Small-flowered Bittercress
Cardamine pensylvanica — Pennsylvania Bittercress, Quaker Bittercress
Cardamine rotundifolia — Mountain Watercress, American Bittercress
Cardiospermum halicacabum — Balloon Vine, Love-in-a-puff, Heartseed
Carduus acanthoides — Plumeless Thistle
Carduus nutans — Nodding Thistle, Musk Thistle
Carex abscondita — thicket sedge
Carex albicans var. albicans — White-tinged Sedge
Carex albolutescens — Greenish-white Sedge
Carex albursina — White Bear Sedge
Carex annectens — Yellowfruit Sedge
Carex appalachica — Appalachian Sedge
Carex austrocaroliniana — South Carolina Sedge
Carex baileyi — Bailey's Sedge
Carex basiantha — Southern Willdenow's Sedge
Carex biltmoreana — Biltmore Sedge, Granite Dome Sedge
Carex blanda — eastern woodland sedge
Carex bromoides ssp. bromoides — Common Brome Sedge
Carex bromoides ssp. montana — Blue Ridge Brome Sedge
Carex caroliniana — Carolina Sedge
Carex cephalophora — oval-leaf sedge
Carex cherokeensis — Cherokee Sedge
Carex collinsii — Collins' Sedge
Carex communis var. communis — Fibrous-rooted Sedge
Carex corrugata — prune-fruit sedge
Carex crawei — Crawe's Sedge
Carex crinita var. crinita — Fringed Sedge, Drooping Sedge
Carex debilis var. debilis — white edge sedge
Carex decomposita — Cypress-knee Sedge, Epiphytic Sedge
Carex digitalis + — slender woodland sedge
Carex flaccosperma — thinfruit sedge
Carex folliculata — northern long sedge
Carex frankii — Frank's sedge
Carex glaucescens — Blue Sedge, Southern Sedge
Carex gracilescens — Slender Sedge
Carex gravida var. gravida — Heavy Sedge, Pregnant Sedge
Carex grayi — Asa Gray's Sedge
Carex grisea — inflated narrow-leaf sedge
Carex gynandra — Mountain Fringed Sedge
Carex intumescens — greater bladder sedge
Carex jamesii — James's Sedge
Carex kobomugi — Japanese Sand Sedge, Japanese Sedge, Sea Isle Sedge, Asiatic Sand Sedge
Carex laevivaginata — smoothsheath sedge
Carex laxiculmis var. laxiculmis — spreading sedge
Carex laxiflora + — broad looseflower sedge
Carex leptalea + — bristlystalked sedge
Carex longii — Long's Sedge
Carex lupuliformis — False Hop Sedge
Carex lupulina — Hop Sedge
Carex lurida — shallow sedge
Carex misera — Wretched Sedge
Carex mitchelliana — Mitchell's Sedge
Carex nigromarginata — Black-edged Sedge
Carex oxylepis + — sharpscale sedge
Carex pensylvanica — Pennsylvania Sedge, High Meadow Sedge
Carex picta — Painted Sedge
Carex pigra — Lazy Sedge
Carex plantaginea — Seersucker Sedge, Plantainleaf Sedge
Carex platyphylla — Broadleaf Sedge
Carex prasina — Necklace Sedge, Drooping Sedge
Carex radfordii — Radford's Sedge
Carex rosea — Rosy Sedge
Carex scabrata — Rough Sedge
Carex striata var. striata — Walter‚Äôs Sedge, Pocosin Sedge
Carex striatula — lined sedge
Carex stricta — Tussock Sedge
Carex styloflexa — bent sedge
Carex superata — Limestone Forest Sedge
Carex swanii — Swan's sedge
Carex torta — Twisted Sedge, Streambed Sedge
Carex tribuloides var. tribuloides — blunt broom sedge
Carex typhina — cattail sedge
Carex umbellata — Parasol Sedge
Carex verrucosa — warty sedge
Carex virescens — ribbed sedge
Carex vulpinoidea var. vulpinoidea — fox sedge
Carex willdenowii — Willdenow's Sedge
Carex woodii — Wood's Sedge
Carphephorus bellidifolius — Sandhill Chaffhead, Carphephorus
Carphephorus corymbosus — Florida Paintbrush
Carphephorus odoratissimus — Vanilla-leaf, Deer's-tongue, Pineland Purple
Carphephorus paniculatus — Deer's-tongue, Hairy Chaffhead, Panicled Chaffhead
Carphephorus tomentosus — Sticky Chaffhead
Carpinus caroliniana + — Musclewood, American Hornbeam, Blue-beech, Ironwood
Carya alba — Mockernut Hickory, White Hickory
Carya aquatica — Water Hickory, Bitter Pecan
Carya carolinae-septentrionalis — Carolina Shagbark Hickory, Southern Shagbark Hickory, Carolina Hickory
Carya cordiformis — Bitternut Hickory
Carya floridana — Scrub Hickory
Carya glabra — Pignut Hickory
Carya illinoinensis — Pecan
Carya laciniosa — Big Shellbark Hickory, Kingnut Hickory
Carya myristiciformis — Nutmeg Hickory
Carya ovalis — Red Hickory, Sweet Pignut Hickory
Carya ovata — Common Shagbark Hickory
Carya pallida — Sand Hickory, Pale Hickory
Carya texana — Black Hickory
Cassytha filiformis — Dodder Laurel, Devil's Gut, Love-vine
Castanea crenata — Japanese Chestnut
Castanea dentata — American Chestnut
Castanea mollissima — Chinese Chestnut
Castanea pumila var. pumila — Common Chinquapin, Chinkapin, Allegheny Chinquapin
Castanea sativa — Spanish Chestnut, European Chestnut
Castilleja coccinea — Eastern Indian Paintbrush
Casuarina equisetifolia — Australian-pine, Horsetail Casuarina, Beach She-oak, Coastal She-oak
Catalpa bignonioides — Southern Catalpa, Fishbait Tree, Cigar Tree
Catalpa fargesii — Farges Catalpa
Catalpa ovata — Chinese Catalpa
Catalpa speciosa — Northern Catalpa, Indian Cigar Tree, Catawba Tree
Catharanthus roseus — Rosy-periwinkle, Madagascar Periwinkle, Cayenne Jasmine
Caulophyllum thalictroides — Common Blue Cohosh, Papooseroot, Green Vivian
Cayaponia quinqueloba — Five-lobed Cucumber, Melon-leaf Cucumber
Cayratia japonica — Bushkiller, Sorrel Vine
Ceanothus americanus — New Jersey Tea, Redroot
Ceanothus herbaceus — Prairie Redroot
Cedrus deodara — Deodar cedar
Celastrus orbiculatus — Oriental Bittersweet
Celastrus scandens — American Bittersweet
Celtis laevigata — Sugarberry, Southern Hackberry, Smooth Hackberry, Lowland Hackberry
Celtis laevigata — Small's Hackberry
Celtis occidentalis — Northern Hackberry
Celtis sinensis — Chinese Hackberry
Celtis tenuifolia — Georgia Hackberry, Dwarf Hackberry
Cenchrus brownii — slimbristle sandbur
Cenchrus longispinus — Northern Sandspur, Common Sandspur
Cenchrus spinifex — Coastal Sandspur
Cenchrus tribuloides — Dune Sandbur, Dune Sandspur
Centaurea cyanus — Bachelor's Buttons, Cornflower
Centaurea diffusa — Tumble Knapweed
Centaurea jacea — Brown Knapweed
Centaurea melitensis — Maltese Star-thistle
Centaurea nigra — Black Knapweed, Spanish-buttons
Centaurea nigrescens — Tyrol Knapweed, Short-fringed Knapweed
Centaurea stoebe ssp. micranthos — Spotted Knapweed, Bushy Knapweed
Centaurea Xmoncktonii — Meadow Knapweed
Centella erecta — Centella, Coinleaf, False Pennywort
Centrosema virginianum — Climbing Butterfly-pea, Spurred Butterfly-pea
Cephalanthus occidentalis — Buttonbush
Cerastium brachypetalum — Gray Mouse-ear, Gray Mouse-ear Chickweed
Cerastium fontanum ssp. vulgare — Common Mouse-ear, Mouse-ear Chickweed
Cerastium glomeratum — Sticky Mouse-ear, Sticky Chickweed, Sticky Mouse-ear Chickweed
Cerastium nutans var. nutans — Mouse-ear Chickweed
Cerastium semidecandrum — Little Mouse-ear, Little Mouse-ear Chickweed
Ceratiola ericoides — Florida Rosemary, Sandhill Rosemary, Sand Heath
Cercis canadensis var. canadensis — Eastern Redbud, Judas Tree
Chaenomeles speciosa — Common Flowering Quince
Chaerophyllum tainturieri var. tainturieri — Southern Chervil, Wild Chervil, Hairyfruit Chervil
Chamaecrista fasciculata var. fasciculata — Common Partridge Pea, Showy Partridge Pea
Chamaecrista nictitans ssp. nictitans var. nictitans — Common Sensitive-plant, Sensitive Partridge Pea
Chamaecyparis thyoides — Atlantic White Cedar, Juniper
Chamaedaphne calyculata — Leatherleaf, Cassandra
Chamaelirium luteum — Fairywand, Devil's Bit
Chamaesyce bombensis — Southern Seaside Spurge, Dixie Sandmat
Chamaesyce hirta — Pillpod Sandmat, Hairy Spurge
Chamaesyce hypericifolia — graceful sandmat
Chamaesyce hyssopifolia — Hyssopleaf Sandmat
Chamaesyce maculata — Spotted Spurge, Milk-purslane, Wartweed, Spotted Sandmat
Chamaesyce nutans — Eyebane
Chamaesyce polygonifolia — Dune Spurge, Northern Seaside Spurge, Northern Sandmat
Chamerion angustifolium ssp. circumvagum — Great Willow-herb, Fireweed
Chaptalia tomentosa — Woolly Sunbonnets, Pineland Daisy, Night-nodding Bog-dandelion, Sunbonnets
Chasmanthium latifolium — River Oats, Northern Sea Oats, Fish-on-a-Pole, Indian Woodoats
Chasmanthium laxum — Slender Woodoats, Slender Spikegrass
Chasmanthium sessiliflorum — Longleaf Woodoats, Upland Oats, Longleaf Spikegrass
Cheilanthes alabamensis — Alabama Lipfern
Cheilanthes lanosa — Hairy Lipfern
Cheilanthes tomentosa — Woolly Lipfern
Chelidonium majus var. majus — Greater Celandine, Rock-poppy, Swallow-wort
Chelone cuthbertii — Cuthbert‚Äôs Turtlehead
Chelone glabra — White Turtlehead
Chelone lyonii — Mountain Turtlehead, Pink Turtlehead, Appalachian Turtlehead
Chelone obliqua + — Purple Turtlehead
Chenopodium album var. album — Lambsquarters, Pigweed
Chimaphila maculata — Pipsissewa, Striped Wintergreen, Spotted Wintergreen
Chimaphila umbellata ssp. cisatlantica — Prince's-pine, Pipsissewa
Chionanthus virginicus — Fringetree, Grancy Graybeard, Old Man's Beard, Grandsir-graybeard
Chrysogonum virginianum + — Green-and-gold
Chrysoma pauciflosculosa — Woody Goldenrod, Bush Goldenrod
Chrysopogon pauciflorus — Florida Goldbeard, Florida Rhaphis
Chrysopsis gossypina ssp. gossypina — Woolly Golden-aster, Cottonleaf Golden-aster, Gossamer Golden-aster
Chrysopsis mariana — Maryland Golden-aster
Chrysopsis pilosa — Soft Golden-aster, Hairy Golden-aster
Chrysopsis subulata — scrubland golden-aster
Chrysosplenium americanum — Golden-saxifrage, Water-carpet, Water-mat
Cichorium intybus — Chicory, Blue Sailors, Succory
Cicuta maculata var. maculata — Water Hemlock, Spotted Cowbane
Cicuta maculata var. maculata — Southern Water Hemlock
Cinna arundinacea — Common Woodreed, Stout Woodreed, Sweet Woodreed
Cinnamomum camphora — Camphortree
Circaea alpina ssp. alpina — Alpine Enchanter's Nightshade, Smaller Enchanter's Nightshade
Circaea lutetiana ssp. canadensis — Canada Enchanter's Nightshade
Cirsium altissimum — Tall Thistle
Cirsium arvense — Canada Thistle, Field Thistle
Cirsium carolinianum — Carolina Thistle, Spring Thistle, Soft Thistle
Cirsium discolor — Field Thistle
Cirsium horridulum var. horridulum — Common Yellow Thistle, Purple Thistle
Cirsium lecontei — LeConte's Thistle
Cirsium muticum — Swamp Thistle
Cirsium nuttallii — Coastal Tall Thistle
Cirsium pumilum — Pasture Thistle
Cirsium repandum — Sandhill Thistle
Cirsium virginianum — Virginia Thistle
Cirsium vulgare — Bull Thistle
Cissus trifoliata — Marine-ivy
Citrullus lanatus var. lanatus — Watermelon
Cladium mariscus ssp. jamaicense — Sawgrass
Cladrastis kentukea — Kentucky Yellowwood, Gopherwood
Claytonia caroliniana + — Carolina Spring-beauty
Claytonia virginica + — Spring-beauty
Cleistes bifaria — Appalachian Small Spreading Pogonia, Smaller Rosebud Orchid, Upland Spreading Pogonia
Cleistes bifaria — Coastal Plain Small Spreading Pogonia
Cleistes divaricata — Rosebud Orchid, Large Spreading Pogonia
Clematis albicoma — White-haired Leatherflower
Clematis catesbyana — Coastal Virgin's Bower, Satin-curls, Climbing Clematis
Clematis crispa — Southern Leatherflower, Marsh Clematis
Clematis flammula — Fragrant Clematis, Fragrant Virgin's Bower, Sweet-scented Virgin's Bower
Clematis fremontii — Fremont's Leatherflower
Clematis glaucophylla — White-leaved Leatherflower
Clematis occidentalis var. occidentalis — Mountain Clematis, Purple Clematis
Clematis ochroleuca — Curlyheads
Clematis reticulata — Vase-vine
Clematis socialis — Alabama Leatherflower
Clematis terniflora — Sweet Autumn Clematis, Yam-leaved Clematis, Sweet Autumn Virgin's Bower
Clematis versicolor — Pale Leatherflower
Clematis viorna — Northern Leatherflower, Vase-vine
Clematis virginiana — Virgin's Bower
Clematis vitalba — Traveler‚Äôs Joy, Old Man's Beard
Clematis viticaulis — Millboro Leatherflower
Cleome hassleriana — Cleome, Spiderflower, Pinkqueen
Cleome rutidosperma — Cleome, Fringed Spiderflower
Clerodendrum bungei — Clerodendrum, Rose Glorybower
Clerodendrum trichotomum var. ferrugineum — Harlequin Glorybower
Clethra acuminata — Mountain Sweet-pepperbush, Cinnamonbark, Cinnamon Clethra, Mountain White-alder
Clethra alnifolia — Coastal Sweet-pepperbush, Coastal White-alder
Clethra alnifolia — Downy Sweet-pepperbush, Downy White-alder
Cliftonia monophylla — Buckwheat-tree, Black Titi, Buckwheat-bush
Clinopodium ashei — Ashe's Savory, Ashe's Calamint, Ohoopee Dunes Wild Basil
Clinopodium coccineum — Scarlet Wild Basil, Scarlet Calamint, Red Mint Shrub
Clinopodium georgianum — Georgia Savory, Georgia Basil, Georgia Calamint, False Peppermint
Clinopodium gracile — Slender Wild Basil
Clinopodium vulgare — Wild Basil
Clintonia borealis — Bluebead-lily, Clinton's Lily, Yellow Clintonia, Yellow Bead Lily
Clintonia umbellulata — Speckled Wood-lily, White Clintonia
Clitoria mariana — Butterfly-pea
Cnicus benedictus — Blessed Thistle
Cnidoscolus urens var. stimulosus — Spurge-nettle, Tread-softly, Bull-nettle, Finger-rot
Cocculus carolinus — Carolina Moonseed, Coralbeads, Carolina Snailseed, Red Moonseed
Cocos nucifera — Coconut Palm
Coelorachis rugosa — Wrinkled Jointgrass
Coincya monensis ssp. recurvata — Wallflower-cabbage, Coincya
Collinsia verna — Eastern Blue-eyed Mary
Collinsonia canadensis — Northern Horsebalm, Citronella, Canada Stoneroot, Canada Horsebalm
Collinsonia serotina — Florida Horsebalm
Collinsonia serotina — Southern Horsebalm, Anise Horsebalm
Collinsonia tuberosa — Tuberous Horsebalm, Stoneroot
Collinsonia verticillata — Whorled Horsebalm
Colocasia esculenta — Elephant's Ear, Taro, Dasheen
Comandra umbellata ssp. umbellata — Eastern Bastard Toadflax
Commelina benghalensis — Tropical Spiderwort, Bengal Dayflower
Commelina caroliniana — Indian Dayflower
Commelina communis — Asiatic Dayflower, Common Dayflower
Commelina diffusa var. diffusa — Spreading Dayflower, Creeping Dayflower
Commelina erecta var. angustifolia — Sand Dayflower, Pineland Dayflower
Commelina erecta var. erecta — Erect Dayflower, Slender Dayflower
Commelina virginica — Virginia Dayflower
Comptonia peregrina — Sweet-fern
Conium maculatum — Poison Hemlock
Conoclinium coelestinum — Mistflower, Wild Ageratum, Hardy Ageratum
Conopholis americana — Squawroot, Bearcorn
Conradina canescens — Gray Rosemary, Conradina
Conradina glabra — Appalachicola Rosemary
Conradina verticillata — Cumberland Rosemary
Convallaria majalis — European Lily-of-the-valley
Convallaria majuscula — American Lily-of-the-valley
Convolvulus arvensis — Field Bindweed, Creeping Jenny, Possession-vine, Cornbind
Conyza canadensis var. canadensis — Common Horseweed
Conyza canadensis var. pusilla — Southern Horseweed
Coptis trifolia — Goldthread, Goldenroot
Corallorhiza maculata — Eastern Spotted Coralroot
Corallorhiza odontorhiza + — Autumn Coralroot
Corallorhiza wisteriana — Spring Coralroot, Wister's Coralroot
Coreopsis auriculata — Eared Coreopsis, Lobed Coreopsis, Eared Tickseed
Coreopsis basalis — Texas Coreopsis
Coreopsis delphiniifolia — Larkspur Coreopsis
Coreopsis falcata — Pool Coreopsis, Carolina Tickseed
Coreopsis gladiata — Swamp Coreopsis, Swamp Tickseed
Coreopsis grandiflora var. grandiflora — Large-flowered Coreopsis, Large-flower Tickseed
Coreopsis grandiflora var. harveyana — Large-flowered Coreopsis, Large-flower Tickseed
Coreopsis lanceolata — Lanceleaf Coreopsis, Longstalk Coreopsis
Coreopsis latifolia — Broadleaf Coreopsis, Broad-leaved Tickseed
Coreopsis major — Woodland Coreopsis, Whorled Coreopsis
Coreopsis major — Whorled Coreopsis, Stiffleaf Coreopsis, Greater Tickseed, Whorled Tickseed
Coreopsis nudata — Swamp Coreopsis
Coreopsis palmata — Prairie Coreopsis
Coreopsis pubescens + — Hairy Coreopsis, Star Tickseed
Coreopsis pulchra — Lookout Mountain Coreopsis
Coreopsis rosea — Rose Coreopsis, Pink Tickseed
Coreopsis tinctoria var. tinctoria — Plains Coreopsis, Calliopsis, Garden Coreopsis
Coreopsis tripteris — Tall Coreopsis, Tall Tickseed, Threeleaf Tickseed
Coreopsis verticillata — Threadleaf Coreopsis, Cutleaf Tickseed
Cornus alternifolia — Alternate-leaf Dogwood, Pagoda Dogwood, Pagoda Cornel
Cornus amomum — Silky Dogwood, Bush Dogwood, Silky Cornel
Cornus asperifolia — Eastern Roughleaf Dogwood
Cornus canadensis — Bunchberry, Dwarf Dogwood, Dwarf Cornel
Cornus drummondii — Midwestern Roughleaf Dogwood
Cornus florida — Flowering Dogwood
Cornus foemina — Southern Swamp Dogwood
Cornus kousa — Kousa Dogwood
Cornus racemosa — Northern Swamp Dogwood, Gray Dogwood
Cornus sericea ssp. sericea — Red Osier Dogwood, Bailey's Dogwood
Coronopus didymus — Wart-cress, Lesser Swine-cress
Cortaderia selloana — Pampas Grass
Corydalis flavula — Yellow Fumitory, Yellow Harlequin, Short-spurred Corydalis
Corydalis incisa — Incised Fumewort, Purple Keman
Corydalis micrantha ssp. australis — Southern Corydalis
Corydalis micrantha ssp. micrantha — Slender Corydalis
Corydalis sempervirens — Pale Corydalis, Rock Harlequin, Pink Corydalis, Tall Corydalis
Corylus americana — American Hazelnut, American Filbert
Corylus cornuta var. cornuta — Beaked Hazelnut
Cotinus obovatus — American Smoketree
Crataegus aemula — Rome Hawthorn
Crataegus aestivalis — Mayhaw, Eastern Mayhaw
Crataegus berberifolia — Barberry Hawthorn
Crataegus brachyacantha — Blueberry Hawthorn
Crataegus calpodendron — Pear Hawthorn
Crataegus chrysocarpa — Margaret's Hawthorn
Crataegus condigna — Pygmy Hawthorn
Crataegus crus-galli — Cockspur Hawthorn
Crataegus dispar — Aiken Hawthorn
Crataegus disperma — Two-seed Hawthorn
Crataegus flava — Rough Hawthorn, Southern Haw
Crataegus flava — Alabama Hawthorn
Crataegus flava — Sunny Hawthorn
Crataegus flava — Yellow Hawthorn
Crataegus flava — Sandhill Hawthorn
Crataegus flava — Bristol Hawthorn
Crataegus flava — Ravenel's Hawthorn
Crataegus flava — Lance‚Äôs Hawthorn
Crataegus flava — Smooth Alabama Hawthorn, Montgomery Hawthorn
Crataegus harbisonii — Ashe Hawthorn
Crataegus harbisonii — Harbison's Hawthorn
Crataegus integra — Lake Ella Hawthorn
Crataegus intricata — Entangled Hawthorn
Crataegus intricata — Buckley's Hawthorn
Crataegus intricata — Boynton's Hawthorn
Crataegus intricata — Birmingham Hawthorn
Crataegus intricata — Biltmore Hawthorn
Crataegus intricata — Bush Hawthorn
Crataegus intricata — Little Red Hawthorn
Crataegus intricata — hawthorn
Crataegus intricata — Yellow-fruited Entangled Hawthorn
Crataegus iracunda — Forest Hawthorn
Crataegus lacrimata — Weeping Hawthorn
Crataegus lanata — Lanate Hawthorn
Crataegus limnophila — Narrowleaf Cockspur Hawthorn
Crataegus macrosperma — Eastern Hawthorn
Crataegus macrosperma — Balsam Mountain Hawthorn
Crataegus marshallii — Parsley Hawthorn, Parsley Haw
Crataegus mendosa — Albertville Hawthorn
Crataegus mollis — Downy Hawthorn
Crataegus monogyna — English Hawthorn, Singleseed Hawthorn
Crataegus munda — Batesburg hawthorn
Crataegus munda — Woolly Dwarf Hawthorn
Crataegus opaca — Western Mayhaw
Crataegus pedicellata — Scarlet Hawthorn
Crataegus pennsylvanica — Pennsylvania Hawthorn
Crataegus phaenopyrum — Washington Hawthorn, Virginia Hawthorn
Crataegus pruinosa — Frosted Hawthorn
Crataegus pulcherrima — Beautiful Hawthorn
Crataegus pulcherrima — Broadleaved Beautiful Hawthorn
Crataegus punctata — Dotted Hawthorn, White Hawthorn
Crataegus rufula — Rufous Mayhaw, Florida Mayhaw
Crataegus sargentii — Sargent's Hawthorn
Crataegus sargentii — Red Mountain Hawthorn
Crataegus schuettei — Schuette's Hawthorn
Crataegus spathulata — Littlehip Hawthorn, Spatulate Haw
Crataegus succulenta — Fleshy Hawthorn
Crataegus succulenta — New River Hawthorn
Crataegus triflora — Threeflower Hawthorn
Crataegus uniflora — Oneflower Hawthorn, Dwarf Haw
Crataegus vailiae — Vail‚Äôs Hawthorn
Crataegus viridis var. viridis — Green Hawthorn
Crepis capillaris — Smooth Hawksbeard
Crepis pulchra — Smallflower Hawksbeard
Crinum americanum — Swamp Lily, String Lily, Seven-sisters
Croptilon divaricatum — Scratch-daisy, Goldenweed
Crossopetalum ilicifolium — Holly-leaf Rhacoma, Christmasberry, Quailberry
Crotalaria ochroleuca — Slenderleaf Rattlebox
Crotalaria pallida var. obovata — Smooth Rattlebox
Crotalaria purshii — Coastal Plain Rattlebox, Pursh's Rattlebox
Crotalaria rotundifolia — Low Rattlebox, Rabbitbells
Crotalaria rotundifolia — Low Rattlebox, Rabbitbells
Crotalaria sagittalis — Common Rattlebox
Crotalaria spectabilis — Showy Rattlebox
Croton alabamensis var. alabamensis — Alabama Croton
Croton argyranthemus — Silver Croton, Sandhill Croton, Healing Croton
Croton capitatus var. capitatus — Woolly Croton, Hogwort, Capitate Croton
Croton elliottii — Elliott's Croton, Pondshore Croton
Croton glandulosus var. septentrionalis — Doveweed, Tooth-leaved Croton, Sand Croton
Croton michauxii var. elliptica — Outcrop Rushfoil, Willdenow's Croton, Glade Rushfoil, Broadleaf Rushfoil
Croton michauxii var. michauxii — Sand Rushfoil, Michaux's Croton, Narrowleaf Rushfoil
Croton monanthogynus — Prairie-tea, One-seed Croton
Croton punctatus — Silverleaf Croton, Gulf Croton, Beach-tea
Cruciata pedemontana — Piedmont Crosswort, Piedmont Bedstraw
Cryptotaenia canadensis — Honewort
Ctenium aromaticum — Toothache Grass, Orange Grass
Ctenium floridanum — Florida Toothache Grass, Florida orangegrass
Cudrania tricuspidata — Cudrania, Strawberry-bush, Chinese Che
Cunila origanoides — Stone-mint, American Dittany, Wild-oregano
Cuphea carthagenensis — Colombian Waxweed
Cuphea viscosissima — Clammy Cuphea, Blue Waxweed
Cupressus arizonica — Arizona Cypress
Cuscuta cephalanthi — Buttonbush Dodder
Cuscuta compacta var. compacta — Compact Dodder
Cuscuta coryli — Hazel Dodder
Cuscuta gronovii var. gronovii — Common Dodder
Cuscuta harperi — Harper's Dodder
Cuscuta indecora + — Bigseed Alfalfa Dodder
Cuscuta japonica — Japanese Dodder
Cuscuta obtusiflora var. glandulosa — Glandular Dodder
Cuscuta pentagona var. pentagona — Five-angled Dodder
Cuscuta polygonorum — Smartweed Dodder
Cuscuta rostrata — Appalachian Dodder, Beaked Dodder
Cuscuta suaveolens — Fringed Dodder
Cycas revoluta — Sago-palm
Cyclospermum leptophyllum — Marsh-parsley
Cymophyllus fraserianus — Fraser's Sedge, Lily-leaf Sedge
Cynanchum angustifolium — Swallow-wort, Sand-vine
Cynanchum laeve — Bluevine, Sandvine, Honeyvine
Cynanchum louiseae — Black Swallow-wort, Dog-Strangling Vine
Cynanchum scoparium — Leafless Swallow-wort, Cynanchum
Cynodon dactylon — Bermuda Grass, Scotch Grass
Cynoglossum officinale — Hound's-tongue, Garden Comfrey
Cynoglossum virginianum var. virginianum — Wild Comfrey
Cyperus articulatus — jointed flatsedge
Cyperus compressus — Poorland Flatsedge
Cyperus croceus — Globe Sedge
Cyperus difformis — Variable Flatsedge, Smallflower Umbrella Sedge
Cyperus entrerianus — Deep-rooted Sedge
Cyperus erythrorhizos — Redroot Flatsedge
Cyperus esculentus + — Yellow Nutsedge, Yellow Nutgrass, Wild Chufa, Earth-almond
Cyperus flavescens — Yellow Flatsedge
Cyperus granitophilus — Granite Flatsedge
Cyperus involucratus — Umbrella Plant
Cyperus iria — Rice-field Flatsedge
Cyperus lancastriensis — Many-flowered Flatsedge
Cyperus lupulinus ssp. lupulinus — Southeastern Flatsedge
Cyperus odoratus — Fragrant Flatsedge
Cyperus odoratus — Slender Sand Flatsedge
Cyperus plukenetii — Starburst Flatsedge, Plukenet‚Äôs Flatsedge, Plukenet‚Äôs Sedge
Cyperus retrorsus var. retrorsus — Pineland Flatsedge
Cyperus rotundus — Purple Nutsedge, Nutgrass, Cocograss
Cyperus squarrosus — Awned Flatsedge
Cyperus strigosus — False Nutsedge
Cyperus virens — green flatsedge
Cypripedium acaule — Pink Lady's Slipper, Mocassin Flower
Cypripedium candidum — White Lady's Slipper
Cypripedium kentuckiense — Kentucky Yellow Lady's Slipper
Cypripedium parviflorum var. parviflorum — Small Yellow Lady's Slipper
Cypripedium parviflorum var. pubescens — Large Yellow Lady's Slipper
Cypripedium reginae — Showy Lady's Slipper, Queen Lady's Slipper
Cyrilla racemiflora — Titi, Swamp Cyrilla, Leatherwood
Cyrtomium falcatum — Japanese Holly Fern, Asian Net-veined Holly Fern
Cyrtomium fortunei — Fortune's Net-veined Holly Fern
Cystopteris bulbifera — Bulblet Bladder Fern, Bulblet Fern
Cystopteris fragilis — Fragile Fern, Brittle Fern
Cystopteris protrusa — Lowland Bladder Fern, Spreading Bladder Fern
Cystopteris tennesseensis — Tennessee Bladder Fern
Cystopteris tenuis — Mackay's Bladder Fern, Mackay's Fragile Fern
Cytisus scoparius var. scoparius — Scotch Broom
Dactylis glomerata + — Orchard Grass
Dactyloctenium aegyptium — Crowfoot Grass
Dactylorhiza viridis — Long-bracted Orchid, Frog Orchid, Long-bracted Frog Orchid
Dalea carnea var. albida — White-tassels
Dalea carnea var. carnea — Pink-tassels
Dalea carnea var. gracilis — Sprawling White-tassels
Dalea gattingeri — Gattinger's Prairie-clover, Purple-tassels
Dalea pinnata var. pinnata — Summer Farewell, Eastern Prairie-clover
Dalea pinnata var. trifoliata — Summer Farewell
Dalea purpurea var. purpurea — Purple Prairie-clover
Dalibarda repens — Robin-runaway, Star-violet, Dewdrop
Danthonia compressa — Mountain Oatgrass, Flattened Oatgrass, Allegheny Flyback
Danthonia epilis — Bog Oatgrass
Danthonia sericea — Silky Oatgrass, Downy Oatgrass
Danthonia spicata — Poverty Oatgrass, Moonshine Grass
Dasistoma macrophylla — Mullein Foxglove
Datura stramonium — Jimsonweed
Daucus carota — Queen Anne's Lace, Wild Carrot, Bird's Nest
Daucus pusillus — American Queen Anne's Lace, American Wild Carrot
Decodon verticillatus — Water-oleander, Water-willow, Swamp Loosestrife, Peatweed
Decumaria barbara — Climbing Hydrangea, Woodvamp, Decumaria
Delphinium carolinianum ssp. calciphilum — Glade Larkspur
Delphinium carolinianum ssp. carolinianum — Prairie Larkspur, Carolina Larkspur, Blue Larkspur
Delphinium exaltatum — Tall Larkspur
Delphinium tricorne — Dwarf Larkspur
Dennstaedtia punctilobula — Hay-scented Fern, Pasture Fern, Boulder Fern
Deparia acrostichoides — Silvery Glade Fern, Silvery Spleenwort
Deparia petersonii — Japanese false spleenwort
Deschampsia cespitosa — Tufted Hairgrass
Deschampsia flexuosa var. flexuosa — Appalachian Hairgrass, Crinkled Hairgrass, Common Hairgrass, Wavy Hairgrass
Descurainia pinnata ssp. pinnata — Southeastern Tansy-mustard
Desmanthus illinoensis — Bundleflower, Prairie Mimosa
Desmodium canescens — Hoary Tick-trefoil
Desmodium ciliare + — Hairy Small-leaved Tick-trefoil, Littleleaf Tick-trefoil
Desmodium cuspidatum var. cuspidatum — Long-bracted Tick-trefoil, Toothed Tick-trefoil
Desmodium fernaldii — Fernald's Tick-trefoil
Desmodium floridanum — Florida Tick-trefoil
Desmodium glabellum — Tall Tick-trefoil, Dillen's Tick-trefoil
Desmodium glutinosum — Heartleaf Tick-trefoil, Clusterleaf Tick-trefoil, Pointed-leaved Tick-Trefoil
Desmodium laevigatum — Smooth Tick-trefoil
Desmodium lineatum — Matted Tick-trefoil
Desmodium marilandicum — Maryland Tick-trefoil
Desmodium nudiflorum — Naked Tick-trefoil, Naked-flowered Tick Trefoil, Woodland Tick-trefoil
Desmodium nuttallii — Nuttall's Tick-trefoil
Desmodium obtusum — Stiff Tick-trefoil
Desmodium paniculatum var. paniculatum — Panicled Tick-trefoil
Desmodium pauciflorum — Few-flowered Tick-trefoil
Desmodium perplexum — perplexed tick-trefoil, Dillen's Tick-trefoil
Desmodium rotundifolium — Roundleaf Tick-trefoil, Dollarleaf, Prostrate Tick-trefoil
Desmodium sessilifolium — Sessile-leaf Tick-trefoil
Desmodium strictum — Pinebarren Tick-trefoil, Pineland Tick-trefoil, Upland Slender Tick-trefoil
Desmodium tenuifolium — Slimleaf Tick-trefoil, Savanna Slender Tick-trefoil
Desmodium tortuosum — dixie tick-trefoil
Desmodium viridiflorum — Velvety Tick-trefoil, Velvety Tick-clover
Deutzia scabra — Deutzia, Pride-of-Rochester
Diamorpha smallii — Elf-orpine
Dianthus armeria — Deptford Pink
Dicentra canadensis — Squirrel Corn
Dicentra cucullaria — Dutchman's Britches
Dicentra eximia — Wild Bleeding Heart
Dicerandra linearifolia + — coastal plain balm
Dicerandra odoratissima — Rose Dicerandra, Rose Balm
Dichanthelium aciculare — Needleleaf Witchgrass, Needleleaf Rosette Grass
Dichanthelium aciculare — Narrow-leaved Witchgrass
Dichanthelium aciculare — Sandy Woods Witchgrass
Dichanthelium aciculare — Spindle-fruited Witchgrass
Dichanthelium aciculare — Nerved Witchgrass
Dichanthelium aciculare — Pineland Witchgrass
Dichanthelium acuminatum var. acuminatum — Woolly Rosette Grass, Woolly Witchgrass, Tapered Rosette Grass, Woolly Panicum
Dichanthelium boscii — Bosc's Witchgrass, Bosc's Panicgrass
Dichanthelium clandestinum — Deer-tongue Witchgrass
Dichanthelium commutatum — Variable Witchgrass
Dichanthelium depauperatum — Starved Witchgrass, Starved Panicgrass
Dichanthelium dichotomum — Ringed Witchgrass
Dichanthelium dichotomum var. dichotomum — Forked Witchgrass
Dichanthelium dichotomum var. dichotomum — Blue Witchgrass
Dichanthelium dichotomum var. dichotomum — Mattamuskeet Witchgrass
Dichanthelium dichotomum var. dichotomum — Bog Witchgrass
Dichanthelium dichotomum var. dichotomum — Witchgrass
Dichanthelium dichotomum var. dichotomum — Peaty Witchgrass
Dichanthelium dichotomum var. dichotomum — Spotted-sheath Witchgrass
Dichanthelium erectifolium — Erect-leaved Witchgrass, Erectleaf Panicgrass
Dichanthelium latifolium — Broadleaf Rosette Grass, Broad-leaved Witchgrass
Dichanthelium laxiflorum — Open-flower Witchgrass, Open-flower Rosette Grass
Dichanthelium longiligulatum — Long-ligule Witchgrass
Dichanthelium oligosanthes var. oligosanthes — Few-flowered Witchgrass
Dichanthelium ravenelii — Ravenel's Witchgrass, Ravenel's Panicum
Dichanthelium sabulorum var. thinium — American Witchgrass
Dichanthelium scoparium — Velvet Witchgrass, Velvet Panicum
Dichanthelium sphaerocarpon — Round-fruited Witchgrass
Dichanthelium sphaerocarpon var. isophyllum — Small-fruited Witchgrass
Dichanthelium strigosum var. glabrescens — Hairless Witchgrass
Dichanthelium strigosum var. leucoblepharis — Dwarf Witchgrass
Dichanthelium strigosum var. strigosum — Rough-hairy Witchgrass
Dichondra carolinensis — Carolina Ponyfoot
Dicliptera brachiata — Branched Foldwing, Dicliptera
Didiplis diandra — Water-purslane
Diervilla lonicera — Northern Bush-honeysuckle
Diervilla rivularis — Hairy Southern Bush-honeysuckle
Diervilla sessilifolia — Smooth Southern Bush-honeysuckle
Digitalis purpurea + — Common Foxglove, Digitalis, Purple Foxglove
Digitaria bicornis — Asian crabgrass
Digitaria ciliaris — Southern Crabgrass
Digitaria filiformis — slender crabgrass
Digitaria sanguinalis — Hairy Crabgrass, Northern Crabgrass
Dioclea multiflora — Cluster-pea, Boykin's Clusterpea
Diodia teres + — Poor-joe, Rough Buttonweed
Diodia virginiana + — Virginia Buttonweed
Dionaea muscipula — Venus Flytrap
Dioscorea alata — Water Yam, White Yam, Great Yam, Winged Yam
Dioscorea bulbifera — Air Yam, Air Potato
Dioscorea oppositifolia — Cinnamon Vine, Chinese Yam
Dioscorea quaternata — Whorled Wild Yam
Dioscorea villosa — Common Wild Yam, Streamhead Yam
Diospyros kaki — Japanese Persimmon, Kaki-plum, Kaki
Diospyros virginiana — American Persimmon, Common Persimmon, Simmon
Diphylleia cymosa — Umbrella-leaf, Pixie-parasol
Diplazium pycnocarpon — Glade Fern
Dipsacus fullonum — Wild Teasel, Common Teasel
Dipsacus laciniatus — Cutleaf Teasel
Dipsacus sativus — Fuller's Teasel
Dirca palustris — Eastern Leatherwood, Leatherbark, Wicopee, Rope-bark
Ditrysinia fruticosa — Sebastian-bush
Dodecatheon meadia ssp. meadia — Eastern Shooting Star
Doellingeria infirma — Appalachian Flat-topped White Aster, Cornel-leaf Aster
Doellingeria sericocarpoides — Pocosin Flat-topped Aster, Southern Whitetop, Streamhead Flat-topped Aster
Doellingeria umbellata var. umbellata — Tall Flat-topped White Aster, Tall Whitetop Aster
Draba aprica — Flatrock Draba, Open-ground Whitlow-grass, Granite Whitlow-wort, Sun-loving Draba
Draba brachycarpa — Short-fruited Draba
Draba verna — Whitlow-grass
Drosera brevifolia — Dwarf Sundew, Early Sundew
Drosera capillaris — Pink Sundew, Bog Sundew
Drosera filiformis — Threadleaf Sundew
Drosera intermedia — Water Sundew, Spoonleaf Sundew
Drosera rotundifolia var. rotundifolia — Roundleaf Sundew
Drosera tracyi — Tracy's Sundew
Drymaria cordata ssp. cordata — Heartleaf Drymary, West Indian Chickweed
Dryopteris campyloptera — Mountain Wood-fern
Dryopteris carthusiana — Spinulose Wood-fern, Toothed Wood-fern
Dryopteris celsa — Log Fern
Dryopteris cristata — Crested Wood-fern, Crested Shield Fern
Dryopteris goldiana — Goldie's Wood-fern
Dryopteris intermedia — Evergreen Wood-fern, Fancy Fern, Intermediate Wood-fern
Dryopteris ludoviciana — Southern Wood-fern, Southern Shield Fern
Dryopteris marginalis — Marginal Wood-fern, Marginal Shield Fern
Duchesnea indica — Indian Strawberry, Mock Strawberry
Dulichium arundinaceum — Three-way Sedge
Dyschoriste humistrata — Swamp Twinflower, Swamp Dyschoriste
Dyschoriste oblongifolia — Blue Twinflower, Pineland Dyschoriste, Oblong Twinflower
Dysphania ambrosioides — Mexican-tea, Epazote
Dysphania anthelmintica — Wormseed, Epazote
Echinacea laevigata — Smooth Purple Coneflower, Smooth Coneflower
Echinacea pallida — Pale Purple Coneflower
Echinacea paradoxa — Yellow Coneflower
Echinacea purpurea — Eastern Purple Coneflower
Echinacea simulata — Prairie Purple Coneflower, Wavy-leaf Purple Coneflower
Echinacea tennesseensis — Tennessee Purple Coneflower
Echinochloa colona — Jungle-rice
Echinochloa crus-galli — Barnyard Grass
Echinochloa crus-pavonis var. crus-pavonis — gulf cockspur grass
Echinochloa muricata var. microstachya — Rough Barnyard Grass
Echinochloa muricata var. muricata — Rough Barnyard Grass
Echinochloa walteri — Swamp Barnyard Grass
Echinocystis lobata — Wild Cucumber, Wild Balsam-apple
Echinodorus cordifolius — Creeping Burhead, Creeping Water-plantain
Echium vulgare — Viper's Bugloss, Blue Weed
Eclipta prostrata — Yerba-de-tajo, false daisy
Egeria densa — Brazilian Waterweed, Brazilian Egeria, "Brazilian Elodea", "Anacharis"
Eichhornia crassipes — Water Hyacinth
Elaeagnus angustifolia — Russian Olive, Oleaster
Elaeagnus multiflora — Cherry Elaeagnus, Cherry Silverberry
Elaeagnus pungens — Thorny Olive, Autumn Siverberry, Silverthorn, Thorny Elaeagnus
Elaeagnus umbellata var. parvifolia — Autumn Olive, Spring Silverberry
Eleocharis baldwinii — Baldwin‚Äôs Spikerush, Slender Spikerush, Roadgrass, Hair Grass
Eleocharis equisetoides — Horsetail Spikerush
Eleocharis geniculata — Canada spikesedge, Bent spikerush
Eleocharis montevidensis — Sand Spikerush
Eleocharis obtusa — Blunt Spikerush
Eleocharis quadrangulata — squarestem spikerush
Eleocharis vivipara — Viviparous Spikerush
Elephantopus carolinianus — Leafy Elephant's Foot, Carolina Elephant's Foot
Elephantopus nudatus — Coastal Plain Elephant's Foot, Smooth Elephant's Foot, Savanna Elephant's Foot, Pineland Elephant's Foot
Elephantopus tomentosus — Common Elephant's Foot, Upland Elephant's Foot, Woodland Elephant's Foot
Eleusine indica — Goose Grass, Yard Grass
Elliottia racemosa — Georgia Plume, Southern-plume, Elliottia
Elymus canadensis — Great Plains Wild-rye, Nodding Wild-rye
Elymus hystrix var. hystrix — Common Bottlebrush Grass
Elymus repens — Quackgrass, Dog-grass, Witchgrass
Elymus virginicus var. virginicus — Virginia Wild-rye, Common Eastern Wild-rye, Terrell Grass
Elytraria caroliniensis var. caroliniensis — Carolina Elytraria
Emex spinosa — Spiny Emex
Emilia fosbergii — Salmon Tasselflower, Cupid‚Äôs-shaving-brush
Enemion biternatum — False Rue-anemone, Isopyrum
Epidendrum magnoliae var. magnoliae — Green-fly Orchid
Epifagus virginiana — Beechdrops
Epigaea repens — Trailing Arbutus, Mayflower
Epilobium ciliatum ssp. ciliatum — American Willow-herb
Epilobium coloratum — Purple-leaved Willow-herb, Bronze Willow-herb, Eastern Willow-herb
Epilobium leptophyllum — Narrow-leaved Willow-herb, American Marsh Willow-herb
Equisetum arvense — Field Horsetail
Equisetum hyemale var. affine — Tall Scouring Rush, River Scouring Rush
Eragrostis capillaris — Lacegrass
Eragrostis cilianensis — Stinkgrass
Eragrostis ciliaris — gophertail lovegrass
Eragrostis curvula — Weeping Lovegrass
Eragrostis elliottii — Elliott's Lovegrass
Eragrostis hirsuta — Bigtop Lovegrass
Eragrostis hypnoides — Creeping Lovegrass, Teal Lovegrass
Eragrostis pilosa — India Lovegrass
Eragrostis spectabilis — Purple Lovegrass, Tumblegrass
Eranthis hyemalis — Winter Aconite
Erechtites hieraciifolius var. hieraciifolius — Fireweed, Pilewort
Eremochloa ophiuroides — Centipede Grass
Erica tetralix — Cross-leaved Heath
Erigenia bulbosa — Harbinger-of-Spring, Pepper-and-Salt, Erigenia
Erigeron annuus — Daisy Fleabane, Annual Fleabane
Erigeron philadelphicus var. philadelphicus — Daisy Fleabane, Common Fleabane, Philadelphia-daisy
Erigeron pulchellus var. pulchellus — Robin's Plantain
Erigeron quercifolius — Southern Fleabane, Oakleaf Fleabane
Erigeron strigosus var. strigosus — Daisy Fleabane, Common Rough Fleabane, Prairie Fleabane, Slender Daisy Fleabane
Erigeron vernus — Whitetop Fleabane, Savanna Daisy Fleabane
Eriocaulon compressum — Flattened Pipewort, Hat Pin
Eriocaulon decangulare var. decangulare — Common Ten-angled Pipewort, Hat Pin, Hard Pipewort
Eriocaulon ravenelii — Ravenel's Pipewort
Eriocaulon texense — Texas Hatpins, Texas Pipewort
Eriochloa michauxii var. michauxii — Longleaf Cupgrass
Eriogonum tomentosum — Sandhill Wild-buckwheat, Southern Wild-buckwheat, Dog-tongue
Eriophorum virginicum — Tawny Cottongrass
Erodium cicutarium ssp. cicutarium — Common Storksbill, Filaree, Heronsbill
Eruca vesicaria ssp. sativa — Arugula, Garden Rocket, Rocket-salad, Salad-rocket
Erucastrum gallicum — Dog Mustard, Rocket-weed, French Rocket
Eryngium aquaticum var. aquaticum — Marsh Eryngo
Eryngium aquaticum var. ravenelii — Ravenel's Eryngo
Eryngium baldwinii — Baldwin's eryngo, Baldwin's button snakeroot
Eryngium integrifolium — Savanna Eryngo, Blueflower Eryngo
Eryngium maritimum — Sea Holly, Seaside Eryngo
Eryngium prostratum — Spreading Eryngo, Creeping Eryngo
Eryngium yuccifolium var. synchaetum — Southern Rattlesnake-master
Eryngium yuccifolium var. yuccifolium — Northern Rattlesnake-master, Button Snakeroot
Erythrina herbacea — Coral Bean, Cardinal-spear
Erythronium albidum — White Fawnlily, White Trout Lily, Blonde Lilian
Erythronium americanum ssp. americanum — American Trout Lily, Dogtooth Violet, Adder's Tongue
Erythronium americanum ssp. harperi — Harper's Trout Lily
Erythronium rostratum — Beaked Trout Lily
Erythronium umbilicatum ssp. monostolum — Southern Appalachian Trout Lily
Erythronium umbilicatum ssp. umbilicatum — Dimpled Trout Lily, Dogtooth Violet
Eubotrys racemosa — Coastal Fetterbush, Swamp Sweetbells, Swamp Leucothoe
Eubotrys recurva — Mountain Sweetbells, Mountain Fetterbush, Deciduous Fetterbush
Euonymus alatus — Winged Burning Bush, Winged Euonymus, Winged Wahoo
Euonymus americanus — Hearts-a-bustin', Strawberry-bush
Euonymus atropurpureus var. atropurpureus — American Wahoo, Burning Bush
Euonymus fortunei var. radicans — Wintercreeper, Climbing Euonymus, Chinese Spindle-tree
Euonymus japonicus — Japanese Spindletree, Japanese Euonymus
Euonymus obovatus — Running Strawberry-bush, Trailing Strawberry Bush, Trailing Wahoo
Eupatorium album var. album — White Boneset, White-bracted Thoroughwort, White Thoroughwort, White Eupatorium
Eupatorium altissimum — Tall Thoroughwort, Tall Boneset
Eupatorium altissimum — Tall Thoroughwort, Tall Boneset, Pasture Eupatorium
Eupatorium anomalum — Anomalous Eupatorium
Eupatorium capillifolium — Common Dog-fennel, Summer Cedar, Yankeeweed
Eupatorium compositifolium — Coastal Dog-fennel, Yankeeweed
Eupatorium glaucescens — Wedgeleaf Eupatorium, Broadleaf Bushy Eupatorium
Eupatorium godfreyanum — Godfrey's Thoroughwort
Eupatorium hyssopifolium + — Hyssopleaf Boneset, Hyssopleaf Thoroughwort, Hyssopleaf Eupatorium
Eupatorium hyssopifolium var. laciniatum — Torrey's Eupatorium
Eupatorium leucolepis var. leucolepis — Eupatorium, Justiceweed
Eupatorium leucolepis var. leucolepis — Savanna Eupatorium, Justiceweed
Eupatorium mohrii — Recurved Eupatorium
Eupatorium mohrii — Mohr's Eupatorium
Eupatorium perfoliatum var. perfoliatum — Boneset
Eupatorium pilosum — Rough Boneset, Ragged Eupatorium
Eupatorium rotundifolium var. cordigerum — Clasping Roundleaf Eupatorium
Eupatorium rotundifolium var. ovatum — Inland Roundleaf Eupatorium
Eupatorium rotundifolium var. rotundifolium — Common Roundleaf Boneset, Common Roundleaf Thoroughwort, Common Roundleaf Eupatorium
Eupatorium semiserratum — Olive Eupatorium, Threeleaf Eupatorium
Eupatorium serotinum — Late-flowering Boneset, Late-flowering Thoroughwort, Late Eupatorium, Late Boneset
Eupatorium sessilifolium var. brittonianum — Britton's Eupatorium
Eupatorium sessilifolium var. sessilifolium — Upland Boneset, Sessile-leaf Eupatorium
Eupatorium sessilifolium var. vaseyi — Vasey's Eupatorium
Euphorbia commutata — Woodland Spurge, Tinted Spurge, Wood Spurge
Euphorbia corollata — Eastern Flowering Spurge
Euphorbia curtisii — White Sandhills Spurge
Euphorbia cyathophora — Painted Leaf, Fire-on-the-mountain
Euphorbia cyparissias — Cypress Spurge, Graveyard Spurge
Euphorbia dentata var. dentata — Toothed Spurge, Green Poinsettia, Wild Poinsettia, Painted Leaf
Euphorbia discoidalis — Summer Spurge
Euphorbia esula var. esula — Wolf's-milk, Leafy Spurge
Euphorbia exserta — Maroon Sandhills Spurge, Coastal Sand Spurge, Purple Sandhill-spurge
Euphorbia graminea — grassleaf spurge
Euphorbia heterophylla — Fiddler's Spurge, Mexican Fireplant
Euphorbia ipecacuanhae — Carolina Ipecac, Wild Ipecac
Euphorbia lathyris — Caper Spurge, Myrtle Spurge, Mole Plant
Euphorbia mercurialina — Cumberland Spurge, Mercury Spurge
Euphorbia pubentissima — False Flowering Spurge, Southeastern Flowering Spurge, Southern Flowering Spurge
Euphorbia purpurea — Glade Spurge, Darlington Spurge, Purple Spurge
Eurybia avita — Alexander's Rock Aster
Eurybia chlorolepis — Blue Ridge White Heart-leaved Aster
Eurybia compacta — Slender Aster
Eurybia divaricata — White Wood Aster, Woodland Aster, Common White Heart-leaved Aster
Eurybia eryngiifolia — Eryngo-leaved Aster, Thistleleaf Aster
Eurybia macrophylla — Large-leaf Aster, Big-leaved Aster
Eurybia mirabilis — Piedmont Aster
Eurybia paludosa — Savannah Grass-leaved Aster, Southern Swamp Aster
Eurybia radula — Rough-leaved Aster, Low Rough Aster
Eurybia schreberi — Schreber's Aster
Eurybia spectabilis — Low Showy Aster
Eurybia surculosa — Creeping Aster
Eustachys petraea — Dune Fingergrass
Euthamia caroliniana — Slender Flat-topped Goldenrod
Euthamia graminifolia var. graminifolia — Flat-topped Goldenrod
Euthamia graminifolia var. hirtipes — Marsh Flat-topped Goldenrod
Euthamia leptocephala — Mississippi Valley Flat-topped Goldenrod
Eutrochium dubium — Coastal Plain Joe Pye Weed, Three-nerved Joe Pye Weed
Eutrochium fistulosum — Hollow-stem Joe Pye Weed
Eutrochium maculatum var. maculatum — Spotted Joe Pye Weed
Eutrochium purpureum var. carolinianum — Carolina Joe Pye Weed
Eutrochium purpureum var. purpureum — Purple-node Joe Pye Weed
Eutrochium steelei — Appalachian Joe Pye Weed, Steele's Joe Pye Weed
Exochorda racemosa — Pearlbush
Facelis retusa — Trampweed, Fluffweed
Fagopyrum esculentum — Buckwheat
Fagus grandifolia — American Beech
Fatoua villosa — Crabweed, Mulberry-weed, Foolish-weed
Festuca brevipila — Hard Fescue
Festuca paradoxa — Cluster Fescue
Festuca subverticillata — Nodding Fescue
Ficus carica — Edible Fig, Garden Fig
Ficus pumila — Climbing Fig, Creeping Fig
Ficus thonningii — Laurel Fig
Filipendula rubra — Queen-of-the-Prairie
Filipendula ulmaria ssp. ulmaria — Queen-of-the-Meadow, Meadowsweet
Fimbristylis caroliniana — Carolina Fimbry
Fimbristylis castanea — Marsh Fimbry
Fimbristylis schoenoides — ditch fimbry
Firmiana simplex — Chinese Parasol-tree, Japanese Varnishtree, Phoenix Tree
Flaveria bidentis — coastal plain yellowtops
Fleischmannia incarnata — Pink Thoroughwort, Pink Eupatorium
Foeniculum vulgare — Fennel
Forestiera acuminata — Swamp-privet
Forestiera godfreyi — Godfrey's Forestiera
Forestiera ligustrina — Upland Swamp Privet, Southern-privet, Glade Privet, Upland Privet
Forestiera segregata var. segregata — Florida-privet
Forsythia suspensa — Weeping Forsythia
Forsythia viridissima — Greenstem Forsythia
Fothergilla gardenii — Coastal Witch-alder, Dwarf Witch-alder, Small Witch-alder, Fothergilla
Fothergilla major — Large Witch-alder, Mountain Witch-alder, Fothergilla
Fragaria virginiana ssp. virginiana — Wild Strawberry
Frangula alnus — Glossy Buckthorn, European Alder-buckthorn
Frangula caroliniana — Carolina Buckthorn, Polecat-tree, Indian Currant
Franklinia alatamaha — Franklinia, Franklin Tree, Lost Gordonia
Frasera caroliniensis — American Columbo
Fraxinus americana — White Ash, American Ash
Fraxinus americana — Biltmore Ash, Biltmore White Ash
Fraxinus caroliniana — Carolina Ash, Water Ash, Pop Ash
Fraxinus pennsylvanica — Green Ash, Red Ash
Fraxinus profunda — Pumpkin Ash
Fraxinus quadrangulata — Blue Ash
Froelichia floridana var. campestris — Plains Cottonseed
Froelichia floridana var. floridana — Common Cottonweed, Florida Cottonseed
Froelichia gracilis — Slender Cottonweed
Fuirena scirpoidea — Southern Umbrella-sedge
Fumaria officinalis — Fumitory, Earthsmoke
Gaillardia aestivalis var. aestivalis — Sandhills Gaillardia, Rayless Blanketflower, Lanceleaf Blanketflower
Gaillardia aestivalis var. flavovirens — lanceleaf blanketflower
Gaillardia pulchella var. picta — Beach Blanket Flower, Gaillardia, Firewheel, Indian Blanket
Gaillardia pulchella var. pulchella — Common Blanket Flower, Gaillardia, Firewheel, Indian Blanket
Galactia elliottii — Elliott's Milkpea
Galactia erecta — Erect Milkpea
Galactia mollis — Soft Milkpea
Galactia regularis — Smooth Milkpea, Common Milkpea
Galactia volubilis — Downy Milkpea, Hairy Milkpea, Twining Milkpea
Galanthus nivalis — Snowdrop
Galax urceolata — Galax, Beetleweed
Galearis spectabilis — Showy Orchis
Galega officinalis — Professor-weed, Goats-rue
Galinsoga parviflora — Lesser Peruvian-daisy, Gallant Soldiers
Galinsoga quadriradiata — Common Peruvian-daisy, Gallant Soldiers
Galium album — white bedstraw
Galium aparine — Cleavers, Bedstraw
Galium asprellum — Rough Bedstraw
Galium boreale — Northern Bedstraw
Galium circaezans var. circaezans — Southern Forest Bedstraw, Wild-licorice
Galium concinnum — Shining Bedstraw
Galium hispidulum — Coastal Bedstraw
Galium lanceolatum — Wild-licorice
Galium latifolium — Purple Bedstraw, Wideleaf Bedstraw
Galium mollugo — False Baby's Breath, Smooth Bedstraw, Hedge Bedstraw, Wild Madder
Galium obtusum ssp. obtusum — Bluntleaf Bedstraw
Galium pilosum + — Hairy Bedstraw
Galium tinctorium — Marsh Bedstraw, Dye Bedstraw
Galium triflorum — Sweet-scented Bedstraw, Fragrant Bedstraw
Galium uniflorum — One-flower Bedstraw
Galium verum — Yellow Bedstraw, Our Lady's Bedstraw
Gamochaeta americana — Shiny Cudweed
Gamochaeta falcata — Narrowleaf Cudweed, Caribbean Everlasting
Gamochaeta falcata — Narrowleaf Cudweed
Gamochaeta pensylvanica — Wandering Cudweed, Pennsylvania Everlasting
Gamochaeta purpurea — Purple Cudweed
Gamochaeta purpurea — Purple Cudweed
Gamochaeta purpurea — Spoonleaf Purple Everlasting, Purple Cudweed
Gamochaeta simplicicaulis — simple-stem everlasting
Gaultheria hispidula — Creeping Snowberry, Moxie
Gaultheria procumbens — Wintergreen, Teaberry
Gaura angustifolia — Southeastern Gaura
Gaura biennis — Biennial Gaura, Northeastern Gaura, Morning Honeysuckle
Gaura filipes — Threadstalk Gaura
Gaylussacia baccata — Black Huckleberry, Crackleberry
Gaylussacia brachycera — Box Huckleberry
Gaylussacia dumosa — Southern Dwarf Huckleberry
Gaylussacia frondosa — Dangleberry
Gaylussacia mosieri — Mosier's Huckleberry, Hirsute Huckleberry
Gaylussacia tomentosa — Woolly Dangleberry, Hairy Dangleberry
Gaylussacia ursina — Bear Huckleberry, Mountain Huckleberry, Buckberry
Gelsemium rankinii — Swamp Jessamine
Gelsemium sempervirens — Carolina Jessamine, Yellow Jessamine
Gentiana alba — Pale Gentian
Gentiana andrewsii var. andrewsii — Prairie Closed Gentian, Closed Bottle Gentian
Gentiana austromontana — Blue Ridge Gentian, Appalachian Gentian
Gentiana autumnalis — Pinebarren Gentian, Autumn Gentian
Gentiana catesbaei — Coastal Plain Gentian, Catesby's Gentian, Elliott's Gentian
Gentiana clausa — Meadow Closed Gentian, Meadow Bottle Gentian
Gentiana decora — Appalachian Gentian
Gentiana linearis — Narrowleaf Gentian
Gentiana saponaria — Soapwort Gentian, Harvest Bells
Gentiana saponaria var. latidens — Balsam Mountain Gentian
Gentiana villosa — Striped Gentian
Gentianella quinquefolia ssp. quinquefolia — Fivefinger Gentian, Eastern Agueweed, Stiff Gentian
Gentianopsis crinita — Eastern Fringed Gentian
Geranium carolinianum var. carolinianum — Carolina Cranesbill
Geranium dissectum — Cutleaf Cranesbill
Geranium maculatum — Wild Geranium
Geranium molle — Dove's-foot Cranesbill
Geranium pusillum — Small-flowered Cranesbill
Geranium robertianum — Herb Robert
Geum canadense var. canadense — White Avens
Geum geniculatum — Bent Avens
Geum radiatum — Mountain Avens, Appalachian Avens, Spreading Avens, Cliff Avens
Geum vernum — Spring Avens
Geum virginianum — Pale Avens, Cream Avens
Gillenia stipulata — Midwestern Indian Physic, American Ipecac
Gillenia trifoliata — Bowman's Root, Mountain Indian Physic, Fawn's Breath
Ginkgo biloba — Ginkgo, Maidenhair Tree
Gladiolus dalenii ssp. dalenii — Gladiolus
Glandularia bipinnatifida var. bipinnatifida — Dakota Vervain, Dakota Mock Vervain
Glandularia canadensis — Rose Vervain, Rose Verbena, Creeping Vervain
Glandularia pulchella — Moss Vervain, South American Vervain, Moss Verbena
Glaucium flavum — Yellow Hornpoppy, Yellow Horned-poppy, Sea-poppy
Glechoma hederacea — Ground Ivy, Gill-over-the-ground, Creeping Charlie
Gleditsia aquatica — Water Locust
Gleditsia triacanthos — Honey Locust
Glyceria septentrionalis — Eastern Mannagrass, Floating Mannagrass
Glyceria striata — Fowl Mannagrass
Goodyera pubescens — Downy Rattlesnake Plantain, Downy Rattlesnake-orchid
Goodyera repens — Dwarf Rattlesnake Orchid, Lesser Rattlesnake-orchid
Gordonia lasianthus — Loblolly Bay, Gordonia
Gossypium hirsutum var. hirsutum — Upland Cotton
Gratiola aurea — Yellow Hedge-hyssop, Golden-pert
Gratiola hispida — Pineland Hedge-hyssop
Gratiola neglecta — Mud-hyssop, Mud Hedge-hyssop
Gratiola pilosa — Shaggy Hedge-hyssop, Pilose Hedge-hyssop
Gratiola virginiana + — Round-fruit Hedge-hyssop, Virginia Hedge-hyssop
Gratiola viscidula — Viscid Hedge-hyssop, Sticky Hedge-hyssop
Gymnocladus dioicus — Kentucky Coffee-tree
Gymnopogon ambiguus — Eastern Skeletongrass, Eastern Beardgrass, Bearded Skeletongrass
Gypsophila paniculata — Tall Baby's Breath
Habenaria quinqueseta — Michaux's Orchid, Long-horned Habenaria
Habenaria repens — Water-spider Orchid, Floating Orchid
Hackelia virginiana — Virginia Stickseed
Halesia carolina — Little Silverbell
Halesia diptera — Common Two-wing Silverbell
Halesia tetraptera var. monticola — Mountain Silverbell
Halesia tetraptera var. tetraptera — Common Silverbell
Hamamelis vernalis — Vernal Witch-hazel, Ozark Witch-hazel, Springtime Witch-hazel
Hamamelis virginiana — American Witch-hazel, Northern Witch-hazel
Hedeoma hispida — Rough Pennyroyal
Hedeoma pulegioides — American Pennyroyal
Hedera colchica — Persian Ivy
Hedera helix — English Ivy, Common Ivy
Hedera hibernica — Atlantic Ivy, Irish Ivy
Helenium amarum var. amarum — Bitterweed
Helenium autumnale var. autumnale — Common Sneezeweed
Helenium brevifolium — Littleleaf Sneezeweed, Shortleaf Sneezeweed
Helenium flexuosum — Purplehead Sneezeweed, Southern Sneezeweed
Helenium pinnatifidum — Sneezeweed
Helenium vernale — Sneezeweed, Spring Helenium
Helianthemum canadense — Canada Frostweed, Canada Sunrose
Helianthemum carolinianum — Carolina Sunrose, Carolina Frostweed, Carolina Rockrose
Helianthemum georgianum — Georgia Sunrose, Georgia Frostweed
Helianthemum rosmarinifolium — Rosemary Sunrose, Rosemary Frostweed
Helianthus agrestis — Southeastern Sunflower
Helianthus angustifolius — Narrowleaf Sunflower , Swamp Sunflower
Helianthus annuus — Common Sunflower
Helianthus atrorubens — Purple-disc Sunflower, Hairy Wood Sunflower, Appalachian Sunflower
Helianthus ciliaris — Texas Blueweed
Helianthus debilis ssp. cucumerifolius — Cucumber-leaf Sunflower
Helianthus decapetalus — Thin-leaved Sunflower, Forest Sunflower
Helianthus divaricatus — Woodland Sunflower, Spreading Sunflower
Helianthus giganteus — Tall Sunflower, Swamp Sunflower, Tuberous Sunflower
Helianthus glaucophyllus — Whiteleaf Sunflower
Helianthus heterophyllus — Savanna Sunflower, Variable-leaf Sunflower
Helianthus hirsutus — Hairy Sunflower, Rough Sunflower
Helianthus longifolius — Longleaf Sunflower
Helianthus maximiliani — Maximilian Sunflower
Helianthus microcephalus — Small Wood Sunflower, Small-headed Sunflower
Helianthus mollis — Downy Sunflower, Ashy Sunflower, Gray Sunflower
Helianthus occidentalis ssp. occidentalis — Naked-stem Sunflower
Helianthus pauciflorus ssp. pauciflorus — Stiff Sunflower
Helianthus porteri — Confederate Daisy
Helianthus radula — Roundleaf Sunflower, Rayless Sunflower
Helianthus resinosus — Hairy Sunflower, Resinous Sunflower, Gray Sunflower
Helianthus schweinitzii — Schweinitz's Sunflower
Helianthus smithii — Smith's Sunflower
Helianthus strumosus — Roughleaf Sunflower, Pale-leaf Woodland Sunflower
Helianthus tuberosus — Jersalem Artichoke
Helianthus Xlaetiflorus [pauciflorus X tuberosus] — cheerful sunflower
Helianthus Xverticillatus — Whorled Sunflower
Heliopsis helianthoides var. helianthoides — False Sunflower, Eastern Oxeye, Eastern Sunflower-everlasting, Smooth Oxeye
Heliotropium amplexicaule — Clasping Heliotrope
Heliotropium curassavicum var. curassavicum — Seaside Heliotrope
Heliotropium indicum — Indian Heliotrope, Turnsole
Helleborus foetidus — Stinking Hellebore
Helleborus niger — black hellebore
Helleborus orientalis — Lenten-rose
Helleborus viridis — Lenten-rose, Green Hellebore, Christmas-rose
Helonias bullata — Swamp Pink
Hemerocallis fulva — Orange Daylily, Tawny Daylily, Roadside Daylily
Hemerocallis lilioasphodelus — Yellow Daylily, Lemon Daylily
Hepatica nobilis var. acuta — Sharp-lobed Hepatica, Sharp-lobed Liverleaf
Hepatica nobilis var. obtusa — Round-lobed Hepatica, Round-lobed Liverleaf
Heracleum mantegazzianum — Giant Hogweed
Heracleum maximum — Cow Parsnip, American Hogweed, Masterwort
Hesperis matronalis — Dame's Rocket
Heteranthera dubia — Water Stargrass
Heteranthera reniformis — Mud Plantain, Kidney-leaf Mud Plantain
Heterotheca camporum var. glandulissimum — Nashville Camphorweed
Heterotheca subaxillaris — Dune Camphorweed
Heterotheca subaxillaris — Common Camphorweed
Heuchera americana var. americana — American Alumroot
Heuchera parviflora var. parviflora — Cave Alumroot, Small-flower Alumroot
Heuchera villosa var. villosa — Mapleleaf Alumroot, Hairy Alumroot, Rock Alumroot
Hexalectris spicata — Crested Coralroot, Spiked Crested Coralroot, Brunetta
Hexastylis arifolia var. arifolia — Little Brown Jug, Arrowhead Heartleaf
Hexastylis arifolia var. callifolia — heartleaf
Hexastylis arifolia var. ruthii — Appalachian Little Brown Jug
Hexastylis contracta — Mountain Heartleaf
Hexastylis heterophylla — Heartleaf Ginger, Variable-leaf Heartleaf, Wild Ginger
Hexastylis lewisii — Lewis's Heartleaf
Hexastylis minor — Little Heartleaf, Small Heartleaf Ginger
Hexastylis naniflora — Dwarf-flower Heartleaf
Hexastylis rhombiformis — French Broad Heartleaf, Carolina Heartleaf
Hexastylis shuttleworthii var. harperi — Harper's Heartleaf
Hexastylis shuttleworthii var. shuttleworthii — Large-flower Heartleaf, Wild Ginger
Hexastylis sorriei — Sandhill Heartleaf, Streamhead Heartleaf
Hexastylis virginica — Virginia Heartleaf, Virginia Ginger
Hibiscus aculeatus — Savanna Hibiscus, Comfort-root
Hibiscus coccineus — Scarlet Rose-mallow, Scarlet Hibiscus, Swamp Mallow
Hibiscus grandiflorus — Large-flowered Hibiscus, Swamp Rose Mallow
Hibiscus laevis — Halberd-leaved Marsh-mallow, Rose Hibiscus, Smooth Rose-mallow, Showy Hibiscus
Hibiscus lasiocarpos — Western Rose-mallow
Hibiscus moscheutos — Eastern Rose-mallow, Swamp Rose-mallow, Wild Cotton
Hibiscus syriacus — Rose-of-Sharon, Althea
Hibiscus trionum — Flower-of-an-hour
Hieracium aurantiacum — Orange Hawkweed, Devil's Paintbrush, Orange King-devil
Hieracium caespitosum — Field Hawkweed, Yellow King-devil
Hieracium gronovii — Hairy Hawkweed, Beaked Hawkweed
Hieracium marianum — Maryland Hawkweed
Hieracium paniculatum — Panicled Hawkweed, Leafy Hawkweed
Hieracium pilosella var. pilosella — Mouse-ear Hawkweed
Hieracium piloselloides — Smooth Hawkweed, Glaucous King-devil
Hieracium scabrum var. scabrum — Rough Hawkweed
Hieracium venosum — Rattlesnake Weed, Veiny Hawkweed, Rattlesnake Hawkweed
Hieracium Xflagellare var. flagellare — Whiplash Hawkweed
Holcus lanatus — Velvet Grass
Hordeum pusillum — Little Barley
Hosta ventricosa — Blue Plantain-lily
Houstonia caerulea — Quaker Ladies, Common Bluet, Innocence
Houstonia canadensis — Canada Bluet
Houstonia longifolia — Eastern Longleaf Bluet
Houstonia longifolia — Diffuse-branched Bluet, Narrow-leaved Houstonia
Houstonia longifolia — Granite Dome Bluet
Houstonia micrantha — Southern Bluet
Houstonia procumbens — Roundleaf Bluet, Creeping Bluet, Trailing Bluet, Fairy-footprints
Houstonia purpurea var. calycosa — Midwestern Summer Bluet, Venus's Pride
Houstonia purpurea var. montana — Roan Mountain Bluet
Houstonia purpurea var. purpurea — Summer Bluet, Purple Bluet, Woodland Bluet
Houstonia pusilla — Tiny Bluet, Small Bluet
Houstonia serpyllifolia — Thyme-leaved Bluet, Appalachian Bluet, Prostrate Bluet, Marsh Bluet
Hudsonia ericoides — Northern Golden-heather
Hudsonia montana — Mountain Golden-heather
Hudsonia tomentosa var. tomentosa — Woolly Beach-heather
Humulus japonicus — Japanese Hops
Huperzia appalachiana — Appalachian Firmoss, Appalachian Fir-clubmoss
Huperzia lucidula — Shining Clubmoss, Shining Firmoss
Huperzia porophila — Rock Clubmoss, Rock Firmoss
Hybanthus concolor — Green Violet
Hydrangea arborescens — Smooth Hydrangea, Sevenbark
Hydrangea cinerea — Ashy Hydrangea
Hydrangea quercifolia — Oakleaf Hydrangea
Hydrangea radiata — Snowy Hydrangea, Silverleaf
Hydrastis canadensis — Goldenseal
Hydrilla verticillata — Hydrilla
Hydrocharis morsus-ranae — European frog-bit
Hydrocleys nymphoides — Water Poppy
Hydrocotyle americana — American Water-pennywort
Hydrocotyle bonariensis — Dune Pennywort, Seaside Pennywort, Dune Water-pennywort
Hydrocotyle prolifera — whorled marsh-pennywort
Hydrocotyle ranunculoides — Swamp Water-pennywort
Hydrocotyle sibthorpioides — Lawn Water-pennywort
Hydrocotyle umbellata — Marsh Water-pennywort
Hydrocotyle verticillata var. verticillata — whorled marsh-pennywort
Hydrolea corymbosa — Tall Hydrolea, Skyflower
Hydrolea quadrivalvis — Waterpod, Waterleaf
Hydrophyllum appendiculatum — Biennial Waterleaf
Hydrophyllum canadense — Mapleleaf Waterleaf, Broad-leaved Waterleaf, Canada Waterleaf
Hydrophyllum macrophyllum — Hairy Waterleaf
Hydrophyllum virginianum — Virginia Waterleaf, Eastern Waterfleaf
Hygrophila polysperma — East Indian Swampweed, East Indian Hygrophila, Miramar Weed, Hygro
Hylotelephium telephioides — Allegheny Live-forever, Cliff Orpine, Allegheny Stonecrop
Hymenocallis coronaria — Rocky-shoals Spiderlily, Catawba Spiderlily, Carolina Spiderlily, Cahaba Lily
Hymenocallis floridana — Florida Spiderlily
Hymenocallis liriosme — Western Marsh Spiderlily, Louisiana Marsh Spiderlily
Hymenocallis occidentalis var. occidentalis — Hammock Spiderlily, Woodland Spiderlily, Northern Spiderlily
Hymenocallis rotata — Spring-run Spiderlily
Hymenopappus scabiosaeus var. scabiosaeus — Woolly-white
Hypericum adpressum — Creeping St. Johnswort, Bog St. Johnswort
Hypericum buckleii — Granite Dome St. Johnswort, Mountain St. Johnswort, Appalachian St. Johnswort, Dwarf St. Johnswort
Hypericum calycinum — Aaron's Beard
Hypericum canadense — Canada St. Johnswort
Hypericum cistifolium — Roundpod St. Johnswort
Hypericum crux-andreae — St. Peter's-wort, St. Andrew's Cross, St. Peter's Cross
Hypericum densiflorum — Mountain Bushy St. Johnswort, Dense-flowered St. Johnswort
Hypericum densiflorum — Interior Bushy St. Johnswort
Hypericum denticulatum — Coppery St. Johnswort
Hypericum dolabriforme — Glade St. Johnswort
Hypericum fasciculatum — Peelbark St. Johnswort
Hypericum frondosum — Golden St. Johnswort
Hypericum galioides — bedstraw St. Johnswort
Hypericum gentianoides — Pineweed, Orange-grass
Hypericum graveolens — Mountain St. Johnswort
Hypericum hypericoides ssp. hypericoides — St. Andrew's Cross
Hypericum hypericoides ssp. multicaule — Creeping St. Andrew's Cross, Low St. Johnswort, Straggling St. Johnswort
Hypericum lloydii — Lloyd's St. Johnswort, Sandhills St. Johnswort, Piedmont St. Johnswort
Hypericum mitchellianum — Blue Ridge St. Johnswort
Hypericum mutilum — Common Dwarf St. Johnswort
Hypericum nudiflorum — Early St. Johnswort, Naked St. Johnswort, Streamside St. Johnswort
Hypericum nudiflorum — early St. Johnswort
Hypericum perforatum — European St. Johnswort
Hypericum prolificum — Shrubby St. Johnswort
Hypericum punctatum — Spotted St. Johnswort
Hypericum reductum — Sandhill St. Johnswort
Hypericum setosum — Hairy St. Johnswort
Hypericum sphaerocarpum — Barrens St. Johnswort
Hypericum suffruticosum — Pineland St. Johnswort
Hypericum tetrapetalum — Low St. Peter's-wort
Hypericum virgatum — Strict St. Johnswort
Hypochaeris radicata — Spotted Cat's-ear, Cat's Ear Dandelion
Hypolepis repens — Creeping Bramble Fern
Hypoxis hirsuta — Yellow Stargrass, Hairy Yellow Stargrass, Common Stargrass, Upland Stargrass
Hypoxis juncea — Fringed Stargrass
Hypoxis wrightii — Bristleseed Stargrass, Pineland Stargrass
Hyptis alata — Musky Mint, Cluster Bushmint
Hyptis mutabilis — Tropical Bushmint
Ilex ambigua — Carolina Holly
Ilex amelanchier — Sarvis Holly
Ilex cassine var. cassine — Dahoon, Cassena, Dahoon Holly
Ilex coriacea — Sweet Gallberry, Big Gallberry, Large Gallberry
Ilex cornuta — Chinese Holly, Burford Holly
Ilex crenata — Japanese Holly
Ilex cuthbertii — Cuthbert Holly
Ilex decidua — Possumhaw, Possumhaw Holly
Ilex glabra — Inkberry, Bitter Gallberry, Little Gallberry
Ilex laevigata — Smooth Winterberry
Ilex longipes — Georgia Holly, Chapman's Holly
Ilex montana — Mountain Holly, Mountain Winterberry
Ilex myrtifolia — Myrtle Holly, Myrtle-leaved Holly
Ilex opaca var. opaca — American Holly, Christmas Holly
Ilex verticillata — Downy Winterberry, Black-alder
Ilex vomitoria — Yaupon Holly, Yaupon
Illicium floridanum — Florida Star-anise, Florida Anise-tree, Stinkbush
Illicium parviflorum — Swamp Star-anise, Yellow Anise-tree, Ocala Anise-tree
Impatiens capensis — Spotted Jewelweed, Spotted Touch-me-not, Orange Jewelweed, Orange Touch-me-not
Impatiens glandulifera — Ornamental Jewelweed, Himalayan Balsam, Indian Balsam
Impatiens pallida — Pale Jewelweed, Pale Touch-me-not, Yellow Jewelweed, Yellow Touch-me-not
Imperata cylindrica — Cogongrass, Bloodroot Grass, Brazilian Satintail
Indigofera caroliniana — Wild Indigo, Carolina Indigo
Indigofera hirsuta — Hairy Indigo, Roughhairy Indigo
Indigofera suffruticosa — West Indian Indigo
Ionactis linariifolius — Stiff-leaf Aster, Flaxleaf Aster, Spruce Aster
Ipomoea aquatica — Water Spinach, Swamp Morning Glory
Ipomoea batatas — Sweet Potato
Ipomoea coccinea — Small Red Morning Glory, Scarlet Creeper
Ipomoea cordatotriloba var. cordatotriloba — Coastal Morning Glory, Tie-vine, Cotton Morning Glory
Ipomoea hederacea — Ivyleaf Morning Glory
Ipomoea hederifolia — Scarlet Creeper
Ipomoea imperati — Fiddle-leaf Morning Glory, Beach Morning Glory
Ipomoea lacunosa — Small White Morning Glory, Small-flowered Morning Glory, Whitestar
Ipomoea macrorhiza — Indian Midden Morning Glory, Manroot
Ipomoea pandurata — Manroot, Wild Potato Vine, Man-of-the-earth, Wild Sweet Potato
Ipomoea pes-caprae ssp. brasiliensis — Railroad Vine, Bay Hops, Bay Winders, Goat's-foot
Ipomoea purpurea — Common Morning Glory
Ipomoea quamoclit — Cypress-vine
Ipomoea sagittata — Saltmarsh Morning Glory
Ipomopsis rubra — Standing-cypress
Iris brevicaulis — Short-stem Iris, Lamance Iris, Zigzag Iris
Iris cristata — Dwarf Crested Iris
Iris fulva — Copper Iris, Red Flag
Iris germanica — German Iris, Fleur-de-Lys
Iris giganticaerulea — Giant Blue Iris
Iris hexagona var. hexagona — Dixie Iris, Anglepod Blue Flag
Iris hexagona var. savannarum — savanna iris
Iris prismatica — Slender Blue Flag, Slender Blue Iris
Iris pseudacorus — Yellow Flag, Water Flag
Iris sibirica — Siberian Iris
Iris tridentata — Bay Blue-flag Iris, Flag
Iris verna var. smalliana — Upland Dwarf Iris
Iris verna var. verna — Coastal Plain Dwarf Iris, Sandhill Iris
Iris virginica var. virginica — Southern Blue Flag
Isoetes appalachiana — Appalachian Quillwort
Isoetes boomii — Boom's Quillwort
Isoetes engelmannii — Engelman's Quillwort
Isoetes georgiana — Georgia Quillwort
Isoetes hyemalis — Wintergreen Quillwort, Winter Quillwort, evergreen quillwort
Isoetes junciformis — Rush Quillwort
Isoetes melanopoda — Eastern Blackfoot Quillwort
Isoetes melanopoda — Blackfoot Quillwort
Isoetes melanospora — Black-spored Quillwort
Isoetes piedmontana — Piedmont Quillwort
Isoetes riparia var. riparia — Shore Quillwort
Isoetes tegetiformans — Mat-forming Quillwort, Merlin's Grass, Mat-forming Melin's grass
Isoetes valida — Mountain Quillwort, Carolina Quillwort
Isoetes virginica — Virginia Quillwort
Isolepis carinata — Keeled Bulrush
Isotria medeoloides — Small Whorled Pogonia, Little Five-leaves
Isotria verticillata — Large Whorled Pogonia, Larger Five-leaves
Itea virginica — Virginia Sweetspire, Virginia-willow
Iva annua + — Sumpweed, Rough Marsh-elder
Iva frutescens ssp. frutescens — Southern Maritime Marsh-elder
Iva imbricata — Seashore Elder, Dune Marsh-elder
Jacquemontia tamnifolia — Jacquemontia, Smallflower Morning Glory, Hairy Clustervine
Jamesianthus alabamensis — Alabama Warbonnet
Jasminum nudiflorum — Winter Jasmine
Jeffersonia diphylla — Twinleaf
Juglans cinerea — Butternut, White Walnut
Juglans nigra — Black Walnut
Juncus acuminatus — tapertip rush
Juncus coriaceus — Leathery Rush
Juncus dichotomus — Forked Rush
Juncus effusus + — Soft Rush, Common Rush
Juncus georgianus — Georgia Rush
Juncus gymnocarpus — Seep Rush, Beaked Rush
Juncus marginatus — grassleaf rush
Juncus megacephalus — Large-headed Rush
Juncus roemerianus — Black Needle Rush
Juncus subcaudatus var. subcaudatus — Somewhat-tailed Rush
Juncus tenuis — Path Rush, Poverty Rush
Juncus trigonocarpus — Redpod Rush
Juniperus communis var. depressa — Ground Juniper, Mountain Juniper, Common Juniper
Juniperus virginiana var. silicicola — Southern Red Cedar, Coastal Red Cedar
Juniperus virginiana var. virginiana — Eastern Red Cedar
Justicia americana — American Water-willow
Justicia angusta — Pineland Water-willow, Narrowleaf Water-willow
Justicia crassifolia — thickleaf water-willow
Justicia ovata var. ovata — Coastal Plain Water-willow, Loose-flower Water-willow
Kallstroemia maxima — Greater Caltrop
Kalmia angustifolia — Northern Sheepkill, Sheep-laurel, Lamb-kill
Kalmia carolina — Southern Sheepkill, Carolina Wicky, Carolina Sheep-laurel, Carolina Bog Myrtle
Kalmia cuneata — White Wicky
Kalmia hirsuta — Hairy Wicky
Kalmia latifolia — Mountain Laurel, Ivy, Calico-bush, Mountain Ivy
Kalopanax septemlobus — Castor Aralia
Kerria japonica — Japanese-rose, Kerria
Koelreuteria paniculata — Golden Rain-tree
Kosteletzkya virginica — Southern Seashore Mallow, Seashore Marshmallow, Virginia Saltmarsh Mallow
Krameria lanceolata — Trailing Ratany, Sandspur, Spreading Ratanay, trailing krameria
Krigia biflora var. biflora — Orange Dwarf-dandelion, Two-flowered Dwarf-dandelion, Two-flowered Cynthia
Krigia caespitosa — Opposite-leaf Dwarf-dandelion
Krigia dandelion — Colonial Dwarf-dandelion, Potato Dandelion
Krigia montana — Mountain Dwarf-dandelion, Mountain Cynthia
Krigia virginica — Virginia Dwarf-dandelion
Kummerowia stipulacea — Korean-clover, Korean Lespedeza
Kummerowia striata — Japanese-clover, Common Lespedeza, Annual Lespedeza
Kyllinga pumila — Annual Greenhead Sedge
Kyllinga squamulata — Crested Greenhead Sedge
Lachnanthes caroliana — Redroot
Lachnocaulon anceps — Common Bogbuttons, Savanna Bogbuttons
Lachnocaulon beyrichianum — Southern Bogbuttons
Lactuca biennis — Tall Blue Lettuce
Lactuca canadensis — American Wild Lettuce
Lactuca floridana var. floridana — Woodland Lettuce
Lactuca graminifolia var. graminifolia — Coastal Plain Lettuce, Slender Wild Lettuce
Lactuca hirsuta + — Downy Lettuce
Lactuca saligna — Willowleaf Lettuce
Lactuca serriola — Prickly Lettuce
Lagerstroemia indica — Crape-myrtle
Lamium amplexicaule — Henbit
Lamium maculatum — Spotted Deadnettle
Lamium purpureum var. purpureum — Purple Deadnettle, Red Deadnettle
Lantana camara — Common Lantana, Hedgeflower
Lantana depressa var. floridana — Florida Lantana
Lantana montevidensis — Trailing Shrub-verbena, Polecat-geranium
Laportea aestuans — West Indian Wood Nettle
Laportea canadensis — Wood Nettle
Lapsana communis — Nipplewort
Larix decidua — European Larch
Larix laricina — Eastern Tamarack, Eastern Larch
Lathyrus hirsutus — Caley Pea, Singletary Pea
Lathyrus latifolius — Everlasting Pea, Perennial Sweet Pea
Lathyrus odoratus — Sweet Pea
Lathyrus sylvestris — Perennial Pea, Narrowleaf Everlasting Pea, Flat Peavine
Lathyrus venosus — Wood Pea, Forest Pea, Bush Vetch, Veiny Pea
Leavenworthia exigua var. exigua — Tennessee Gladecress, Least Glade-cress
Leavenworthia uniflora — Michaux's Glade-cress
Lechea deckertii — Deckert's Pinweed
Lechea racemulosa — Racemose Pinweed, Oblong-fruit Pinweed
Lechea tenuifolia — narrowleaf pinweed
Leersia lenticularis — Catchfly Cutgrass
Leersia oryzoides — Rice Cutgrass
Leersia virginica — White Cutgrass, Whitegrass
Leiophyllum buxifolium — Sand-myrtle, Mountain Myrtle
Leitneria floridana — Corkwood, Florida Corkwood
Lemna perpusilla — Tiny Duckweed, Small Duckweed
Lepidium campestre — Cow Cress, Field Pepperwort, Field Cress, Field Pepperweed
Lepidium latifolium — Broadleaf Pepper-grass
Lepidium virginicum var. virginicum — Poor Man's Pepper, Peppergrass
Leptochloa dubia — Green Sprangletop
Leptochloa panicea ssp. brachiata — Red Sprangletop
Leptochloa panicea ssp. mucronata — Red Spangletop
Lespedeza angustifolia — Narrow-leaved Lespedeza, Narrowleaf Bush-clover
Lespedeza bicolor — Bicolor Lespedeza, Bicolor, Shrubby Lespedeza
Lespedeza capitata — Round-headed Bush-clover, Round-headed Lespedeza, Silvery Bush-clover
Lespedeza cuneata — Sericea Lespedeza, Chinese Lespedeza
Lespedeza frutescens — Violet Lespedeza
Lespedeza hirta + — Hairy Bush-clover, Hairy Lespedeza, Silvery Lespedeza
Lespedeza procumbens — Downy Trailing Lespedeza, Trailing Bush-clover
Lespedeza repens — Smooth Trailing Lespedeza, Creeping Lespedeza, Creeping Bush-clover
Lespedeza stuevei — Velvety Lespedeza, Stueve's Bush-clover
Lespedeza thunbergii — Thunberg's Lespedeza
Lespedeza violacea — Wand Lespedeza, Wandlike Bush-clover, Violet Bush-clover
Lespedeza virginica — Virginia Lespedeza, Slender Lespedeza, Virginia Bush-clover, Slender Bush-clover
Leucaena leucocephala — White Leadtree, Leucaena, Jumbie-bean
Leucanthemum vulgare — Ox-eye Daisy, Common Daisy
Leucojum aestivum ssp. aestivum — Summer Snowflake
Leucothoe axillaris — Coastal Doghobble, Coastal Plain Doghobble
Leucothoe fontanesiana — Mountain Doghobble, Switch-ivy
Liatris aspera var. intermedia — Rough Blazing-star
Liatris chapmanii — Chapman's Blazing-star
Liatris cokeri — Sandhills Blazing-star
Liatris elegans var. elegans — Common Elegant Blazing-star
Liatris garberi — Garber‚Äôs Blazing-star
Liatris helleri — Smooth Blazing-star, Heller's Blazing-star
Liatris microcephala — Narrow-leaf Blazing-star, Small-head Blazing-star
Liatris pauciflora — Sandhills Blazing-star, One-sided Blazing-star
Liatris pilosa — Grass-leaved Blazing-star
Liatris pycnostachya + — Prairie Blazing-star
Liatris scariosa var. scariosa — Northern Blazing-star
Liatris spicata var. resinosa — Dense Blazing-star, Bog Blazing-star
Liatris spicata var. spicata — Dense Blazing-star, Mountain Blazing-star, Florist's Gayfeather, Dense Gayfeather
Liatris squarrosa var. squarrosa — Scaly Blazing-star, Squarrose Gayfeather, Longbracted Blazing-star
Liatris squarrulosa — Southern Blazing-star, Earle's Blazing-star
Liatris tenuifolia var. tenuifolia — Shortleaf Blazing-star, Shortleaf Gayfeather, Slender Blazing-star
Liatris virgata — wand blazing star
Licania michauxii — Gopher-apple, Ground-oak
Ligusticum canadense — American Lovage
Ligustrum amurense — Amur Privet
Ligustrum japonicum — Japanese Privet
Ligustrum lucidum — Glossy Privet, Broadleaf Privet
Ligustrum obtusifolium — Border Privet
Ligustrum ovalifolium — California Privet
Ligustrum sinense — Chinese Privet
Ligustrum vulgare — European Privet, Common Privet
Lilaeopsis carolinensis — Carolina Lilaeopsis
Lilaeopsis chinensis — Marsh Lilaeopsis
Lilium canadense ssp. canadense — Yellow Canada Lily, Wild Yellow Lily
Lilium canadense ssp. editorum — Red Canada Lily
Lilium catesbaei + — Pine Lily, Catesby's Lily, Leopard Lily
Lilium grayi — Gray's Lily, Roan Lily
Lilium iridollae — Sandhills Lily, Sandhills Bog Lily
Lilium lancifolium — Tiger Lily
Lilium michauxii — Carolina Lily
Lilium michiganense — Michigan Lily
Lilium philadelphicum var. philadelphicum — Wood Lily
Lilium superbum — Turk's Cap Lily
Limnobium spongia — American Frogsbit, Spongeplant
Limnophila sessiliflora — Asian Marshweed
Limonium carolinianum — Carolina Sea-lavender
Linaria purpurea — purple toadflax
Linaria vulgaris — Butter-and-eggs, Yellow Toadflax, Wild-snapdragon
Lindera benzoin var. benzoin — Northern Spicebush, Wild Allspice
Lindera melissifolia — Southern Spicebush, Pondberry
Lindera subcoriacea — Bog Spicebush, Streamhead Spicebush
Lindernia dubia var. dubia — Yellowseed False Pimpernel
Lindernia monticola — Flatrock Pimpernel, Riverbank Pimpernel, False Pimpernel
Linum floridanum var. chrysocarpum — Yellow-fruited Yellow Flax, Florida yellow flax
Linum floridanum var. floridanum — Florida Yellow Flax, Savanna Flax
Linum intercursum — Bicknell's Yellow Flax, sandplain flax
Linum medium var. texanum — Texas Yellow Flax, Stiff Yellow Flax, Spreading Flax, Texas Flax
Linum striatum — Ridgestem Yellow Flax, Ridged Yellow Flax
Linum virginianum — Virginia Yellow Flax, Woodland Flax
Liparis liliifolia — Lily-leaved Twayblade, Large Twayblade, Mauve Sleekwort, Brown Wide-lip Orchid
Liquidambar styraciflua — Sweetgum
Liriodendron tulipifera — Tulip-tree, Yellow Poplar, Whitewood
Liriope graminifolia — Liriope, Lilyturf
Liriope muscari — Liriope, Big Blue Lilyturf
Liriope spicata — Liriope, Creeping Lilyturf
Listera australis — Southern Twayblade
Listera smallii — Kidneyleaf Twayblade, Appalachian Twayblade, Small's Twayblade
Lithospermum canescens — Hoary Puccoon, Indian-paint
Lithospermum caroliniense var. caroliniense — Coastal Plain Puccoon, Hairy Puccoon, Sandhill Puccoon
Lithospermum latifolium — American Gromwell, Broadleaf Gromwell
Lithospermum tuberosum — Southern Stoneseed
Litsea aestivalis — Pondspice
Lobelia amoena var. amoena — Southern Lobelia
Lobelia boykinii — Boykin's Lobelia
Lobelia cardinalis — Cardinal Flower
Lobelia elongata — Purple Lobelia, Streamside Lobelia
Lobelia glandulosa — Savanna Lobelia
Lobelia inflata — Indian-tobacco, Pukeweed
Lobelia nuttallii — Nuttall's Lobelia
Lobelia paludosa — White Lobelia
Lobelia puberula + — Downy Lobelia, Hairy Lobelia
Lobelia siphilitica var. siphilitica — Great Blue Lobelia
Lobelia spicata var. scaposa — Spiked Lobelia, Pale Spiked Lobelia
Lobelia spicata var. spicata — Spiked Lobelia, Pale Spiked Lobelia
Lolium perenne ssp. multiflorum — Italian Ryegrass, Annual Ryegrass
Lolium perenne ssp. perenne — English Rye-grass, Perennial Rye-grass
Lolium temulentum ssp. temulentum — Darnel rye-grass
Lonicera canadensis — American Fly-honeysuckle, Fly-honeysuckle
Lonicera dioica — Smooth Honeysuckle, Mountain Coral Honeysuckle, Lonicera
Lonicera flava — Yellow Honeysuckle
Lonicera fragrantissima — Sweet-breath-of-spring, Winter Honeysuckle
Lonicera japonica — Japanese Honeysuckle
Lonicera maackii — Amur Bush-honeysuckle, Amur Honeysuckle
Lonicera morrowii — Morrow's Honeysuckle
Lonicera sempervirens — Coral Honeysuckle, Woodbine, Trumpet Honeysuckle
Lonicera standishii — Standish's Honeysuckle
Lonicera tatarica — Tatarian Honeysuckle
Lonicera Xbella [morrowii X tatarica] — Bell's Honeysuckle, Pretty Honeysuckle
Lonicera xylosteum — European Fly-honeysuckle, Dwarf Honeysuckle
Lophiola aurea — Goldencrest
Lotus corniculatus — Birdsfoot-trefoil, Eggs-and-Bacon
Lotus glaber — Slender Birdsfoot-trefoil
Ludwigia alternifolia — Alternate-leaf Seedbox
Ludwigia arcuata — piedmont primrose-willow
Ludwigia brevipes — Long Beach Seedbox, Coastal Plain Water-purslane
Ludwigia decurrens — Wingstem Water-primrose
Ludwigia grandiflora ssp. grandiflora — Showy Water-primrose
Ludwigia grandiflora ssp. hexapetala — Common Water-primrose
Ludwigia hirtella — Rafinesque's Seedbox
Ludwigia leptocarpa — Water-willow, Primrose Willow
Ludwigia maritima — Harper's Seedbox
Ludwigia palustris — Common Water-purslane, Marsh Purslane
Ludwigia repens — Creeping Seedbox
Ludwigia suffruticosa — Shrubby Seedbox
Ludwigia virgata — Savanna Seedbox, Slender Seedbox
Lunaria annua — Annual Honesty, Money Plant, Silver-dollar Plant
Lupinus angustifolius — Narrowleaf Lupine
Lupinus diffusus — Blue Sandhill Lupine, Sky-blue Lupine
Lupinus perennis ssp. gracilis — Southern Sundial Lupine
Lupinus perennis ssp. perennis var. perennis — Northern Sundial Lupine
Lupinus villosus — Lady Lupine, Pink Sandhill Lupine
Luzula acuminata ssp. acuminata — hairy woodrush
Luzula acuminata ssp. carolinae — Carolina woodrush
Luzula bulbosa — bulbous woodrush
Luzula echinata — Hedgehog Woodrush, Spreading Woodrush
Luzula multiflora ssp. multiflora var. multiflora — woodrush
Lychnis coronaria — Mullein-pink, Rose Campion
Lychnis flos-cuculi — Ragged Robin
Lycium carolinianum var. carolinianum — Christmas-berry, Carolina Matrimony-vine
Lycopodiella alopecuroides — Foxtail Clubmoss, Foxtail Bog Clubmoss
Lycopodiella appressa — Southern Bog Clubmoss
Lycopodiella caroliniana var. caroliniana — Carolina Bog Clubmoss, Slender Clubmoss
Lycopodiella cernua var. cernua — Nodding Clubmoss, Staghorn Clubmoss
Lycopodiella prostrata — Featherstem Clubmoss, Prostrate Bog Clubmoss
Lycopodium annotinum — Stiff Clubmoss, Bristly Clubmoss
Lycopodium clavatum — Staghorn Clubmoss, Running Clubmoss, Ground-pine
Lycopodium dendroideum — Tree Ground-pine, Round-branch Clubmoss, Prickly Tree-clubmoss
Lycopodium digitatum — Common Running-cedar, Fan Ground-pine, Running Ground-pine, Common Running-pine
Lycopodium hickeyi — Pennsylvania Ground-pine, Hickey's Tree-clubmoss
Lycopodium obscurum — Common Ground-pine, Flat-branched Tree-clubmoss
Lycopodium tristachyum — Blue Running-cedar, Ground-cedar
Lycopus rubellus — Stalked Bugleweed
Lycopus virginicus — Virginia Bugleweed
Lycoris radiata — Magic Lily, Hurricane Lily, Surprise Lily, Spider Lily
Lygodesmia aphylla — Rose-rush, Flowering Straw
Lygodium japonicum — Japanese Climbing Fern
Lygodium microphyllum — Old World Climbing Fern, Small-leaf Climbing Fern
Lygodium palmatum — American Climbing Fern
Lyonia ferruginea — Rusty Lyonia, Staggerbush, Dragonwood, Crookedwood
Lyonia fruticosa — Staggerbush, Poor-grub
Lyonia ligustrina var. ligustrina — Northern Maleberry, He-huckleberry
Lyonia lucida — Shining Fetterbush, Lyonia, Hemleaf
Lyonia mariana — Staggerbush
Lysimachia asperulifolia — Pocosin Loosestrife, "Roughleaf Loosestrife"
Lysimachia ciliata — Fringed Loosestrife
Lysimachia clethroides — Gooseneck Loosestrife
Lysimachia fraseri — Fraser's Loosestrife
Lysimachia graminea — Grassleaf Yellow-loosestrife
Lysimachia hybrida — Lowland Loosestrife
Lysimachia lanceolata — Lanceleaf Loosestrife
Lysimachia loomisii — Carolina Loosestrife
Lysimachia nummularia — Moneywort, Creeping Jenny, Creeping Charlie
Lysimachia quadriflora — Prairie Loosestrife, Smooth Loosestrife, Four-flowered Loosestrife
Lysimachia quadrifolia — Whorled Loosestrife
Lysimachia terrestris — Swamp Candles, Bog-candles, Bog Loosestrife
Lysimachia tonsa — Southern Loosestrife, Appalachian Loosestrife
Lysimachia vulgaris — Garden Loosestrife
Lythrum alatum var. alatum — Northern Winged Loosestrife
Lythrum salicaria — Purple Loosestrife
Macbridea caroliniana — Carolina Birds-in-a-nest, Carolina Macbridea, Carolina Bogmint
Maclura pomifera — Osage-orange, Hedge-apple, Bow-wood
Macroptilium lathyroides — Wild Bushbean
Macrothelypteris torresiana — Mariana Maiden Fern, Swordfern
Magnolia acuminata — Cucumber Magnolia, Cucumber-tree
Magnolia acuminata — Yellow Cucumber-tree, Showy Cucumber Magnolia
Magnolia ashei — Ashe's Magnolia
Magnolia fraseri — Fraser Magnolia, Mountain Magnolia, Earleaf Umbrella-tree, Umbrella Tree
Magnolia grandiflora — Southern Magnolia, Bull Bay
Magnolia macrophylla — Bigleaf Magnolia, Large-leaved Magnolia, Umbrella Tree
Magnolia pyramidata — Pyramid Magnolia
Magnolia tripetala — Umbrella Magnolia, Umbrella-tree
Magnolia virginiana — Sweetbay, Sweetbay Magnolia, Swampbay
Mahonia bealei — Leatherleaf Mahonia, Chinese Mahonia, Holly-grape
Mahonia nervosa — Cascade Oregon Grape, Cascades Mahonia
Mahonia repens — Creeping Oregon Grape
Maianthemum canadense — Canada Mayflower, False Lily-of-the-valley, Wild Lily-of-the-valley
Maianthemum racemosum ssp. racemosum — False Solomon's Seal, Eastern Solomon's Plume
Maianthemum stellatum — Starry Solomon's Seal, Starry Solomon's Plume, Starflower
Malaxis bayardii — Appalachian Adder's-mouth Orchid
Malaxis spicata — Florida Adder's-mouth Orchid
Malaxis unifolia — Green Adder's-mouth Orchid
Malus angustifolia var. angustifolia — Southern Crabapple, Wild Crabapple
Malus baccata — Siberian Crabapple
Malus coronaria — Wild Crabapple, Sweet Crabapple
Malus pumila — Common Apple
Malva moschata — Marsh Mallow, Musk Mallow, Rose Mallow
Malvaviscus arboreus var. arboreus — Wax Mallow
Malvaviscus arboreus var. drummondii — Wax Mallow, Turk's-cap Mallow
Malvaviscus penduliflorus — Turk‚Äôs-cap Mallow, Mazapan
Manfreda virginica — Eastern False Aloe, Rattlesnake-master
Marshallia caespitosa — Barbara's Buttons
Marshallia graminifolia var. cynanthera — Grassleaf Barbara's-buttons
Marshallia graminifolia var. graminifolia — Grassleaf Barbara's-buttons
Marshallia grandiflora — Appalachian Barbara's-buttons, Large-flowered Barbara's-buttons
Marshallia legrandii — Oak Barrens Barbara's-buttons
Marshallia mohrii — Coosa Barbara's-buttons
Marshallia obovata var. obovata — Piedmont Barbara's-buttons, Spoon-leaved Barbara's-buttons
Marshallia obovata var. scaposa — Savanna Barbara's-buttons
Marshallia ramosa — Pineland Barbara's-buttons, Southern Barbara's-buttons
Marshallia trinervia — Colonial Barbara's-buttons, Broadleaf Barbara's-buttons
Marsilea macropoda — Golden Waterclover, Big-footed Waterclover
Marsilea minuta — Dwarf Waterclover, Small Waterclover
Marsilea mutica — Australian Waterclover, Nardoo
Marsilea quadrifolia — European Waterclover, European Pepperwort, European Water Shamrock
Matelea carolinensis — Carolina Spinypod, Climbing Milkweed, Climbing Milkvine
Matelea decipiens — Deceptive Spinypod
Matelea flavidula — Yellow Spinypod
Matelea gonocarpos — Eastern Anglepod
Matelea obliqua — Northern Spinypod, Limerock Milkvine, Climbing Milkvine
Matricaria discoidea — Pineapple-weed, Rayless Chamomile
Mayaca fluviatilis — Bogmoss
Mazus miquelii — Creeping Mazus, Miquel's mazus
Mazus pumilus — Japanese Mazus
Mecardonia acuminata var. acuminata — Mecardonia, Common Axilflower
Medeola virginiana — Indian Cucumber-root
Medicago arabica — Spotted Medick, Spotted Bur-clover
Medicago lupulina — Black Medick, Yellow Trefoil
Medicago sativa ssp. sativa — Alfalfa, Lucerne, Blue Alfalfa
Meehania cordata — Meehania
Melaleuca quinquenervia — Paperbark Tree , Meleleuca, Punktree
Melampyrum lineare + — Cow-wheat
Melanthera angustifolia — Everglades squarestem
Melanthera nivea — Melanthera, Snow Squarestem
Melia azedarach — Chinaberry, Pride-of-India
Melica mutica — Melic Grass, Two-flower Melic
Melilotus indicus — Small Melilot, Sourclover
Melilotus officinalis — White Sweetclover, White Melilot
Melilotus officinalis — Yellow Sweetclover, Yellow Melilot, Ribbed Melilot
Melinis repens — Rose Natalgrass
Melochia corchorifolia — Chocolate-weed
Melochia spicata — Bretonica Peluda
Melothria pendula var. pendula — Creeping Cucumber
Menispermum canadense — Moonseed, Yellow Parilla
Mentha arvensis — Canada Mint, Field Mint, Wild Mint
Mentha spicata — Spearmint
Mentha Xpiperita [aquatica X spicata] — Peppermint
Menziesia pilosa — Minniebush
Mertensia virginica — Virginia Bluebells, Virginia Cowslip
Micranthemum umbrosum — Shade Mudflower
Microstegium vimineum — Japanese Grass, Japanese Stiltgrass, Nepalese Browntop, Nepal Grass
Microthlaspi perfoliatum — Perfoliate Penny-cress, Thoroughwort Penny-cress
Mikania cordifolia — Heartleaf Climbing Hempweed
Mikania scandens — Climbing Hempweed
Mimosa microphylla — Eastern Sensitive-briar
Mimosa quadrivalvis var. floridana — Florida Sensitive-briar, Sensitive Vine, Powderpuff Mimosa
Mimosa strigillosa — Mimosa Vine, Sensitive Vine, Powderpuff Mimosa
Mimulus alatus — Winged Monkey-flower, Sharpwing Monkey Flower
Mimulus ringens var. ringens — Allegheny Monkey-flower, Square-stemmed Monkey-flower
Minuartia caroliniana — Carolina Sandwort, Longroot
Minuartia glabra — Appalachian Sandwort
Minuartia godfreyi — Godfrey's Sandwort
Minuartia groenlandica — Greenland Sandwort, Mountain Sandwort
Minuartia patula — Lime-barren Sandwort, Glade Sandwort
Minuartia uniflora — Piedmont Sandwort
Mirabilis jalapa — Garden Four-o'clock, Marvel-of-Peru
Mirabilis nyctaginea — Wild Four-o'clock, Heart-leaved Umbrella-wort
Miscanthus sacchariflorus — Amur Silvergrass
Miscanthus sinensis — Chinese Silvergrass
Mitchella repens — Partridgeberry, Twinflower
Mitella diphylla — Two-leaved Miterwort, Bishop's Cap
Mitreola petiolata — Caribbean Miterwort
Modiola caroliniana — Carolina Bristlemallow, Bristly-mallow, Carolina Mallow
Mollugo verticillata — Carpetweed, Indian-chickweed
Momordica charantia — Balsam-apple, Bitter Melon, Balsam-pear
Monarda citriodora ssp. citriodora var. citriodora — Lemon Bergamot, Lemon Mint
Monarda clinopodia — Basil Bergamot, Basil Balm
Monarda didyma — Bee-balm, Oswego Tea
Monarda fistulosa + — Wild Bergamot
Monarda media — Purple Bee-balm
Monarda punctata ssp. punctata var. punctata — Eastern Horse-mint, Spotted Bee-balm
Monotropa hypopithys — Pinesap
Monotropa uniflora — Indian Pipes, Ghost Flower
Monotropsis odorata — Appalachian Pygmy Pipes, Sweet Pinesap
Morella caroliniensis — Pocossin Bayberry, Evergreen Bayberry, Swamp Candleberry, Southern Bayberry
Morella cerifera — Common Wax Myrtle, Southern Bayberry
Morella cerifera — Dwarf Wax Myrtle, Dwarf Bayberry
Morella inodora — Scentless Bayberry, Odorless Bayberry
Morella pensylvanica — Northern Bayberry
Morus alba — White Mulberry, Silkworm Mulberry, Russian Mulberry
Morus rubra var. rubra — Red Mulberry
Mosla dianthera — Miniature Beefsteak-plant, Mosla
Muhlenbergia capillaris — Pink Muhlygrass, Upland Muhly, Hairawn Muhly, Hairgrass
Muhlenbergia expansa — Savannah Hairgrass
Muhlenbergia filipes — Dune Hairgrass, Sweetgrass
Muhlenbergia mexicana — Hairy Wirestem Muhly
Muhlenbergia schreberi — Nimblewill
Muhlenbergia sylvatica — Woodland Muhly
Muhlenbergia tenuiflora — Slender Muhly
Murdannia keisak — Murdannia, Asian Spiderwort, Marsh Dayflower, Wart-removing Herb
Murdannia nudiflora — Doveweed
Muscari botryoides — Compact Grape-hyacinth
Muscari neglectum — Grape-hyacinth, Blue Bottles
Myosotis arvensis — Field Forget-me-not, Field Scorpion-grass
Myosotis discolor — Yellow-and-blue Scorpion-grass, Changing Forget-me-not
Myosotis laxa — Smaller Forget-me-not, Marsh Forget-me-not, Tufted Forget-me-not
Myosotis macrosperma — Bigseed Forget-me-not, Scorpion-grass
Myosotis scorpioides — Water Scorpion-grass, True Forget-me-not
Myosotis stricta — Blue Scorpion-grass
Myosotis verna — Spring Forget-me-not, Early Forget-me-not, Early Scorpion-grass
Myosoton aquaticum — Water-chickweed, Giant Chickweed, Water Mouse-ear
Myosurus minimus — Mousetail
Myrica gale — Sweet Gale
Myriophyllum aquaticum — Parrot-feather
Myriophyllum heterophyllum — Southern Water-milfoil, Variable-leaf Water-milfoil
Myriophyllum laxum — Loose Water-milfoil, Sandhills Milfoil, Lax Water-milfoil, Piedmont Water-milfoil
Myriophyllum sibiricum — Common Water-milfoil
Myriophyllum spicatum — Eurasian Water-milfoil
Myriophyllum verticillatum — Water-milfoil
Najas guadalupensis ssp. guadalupensis — Common Naiad, Southern Naiad
Najas minor — Spinyleaf Naiad
Nama jamaicense — Jamaica Weed
Nandina domestica — Nandina, Heavenly Bamboo, Sacred-bamboo
Narcissus pseudonarcissus — Daffodil
Nasturtium microphyllum — Narrow-fruited Watercress, Onerow Yellowcress
Nasturtium officinale — Watercress
Nelumbo lutea — Yonkapin, American Lotus-lily, Yellow Nelumbo, Pond-nuts
Nelumbo nucifera — Sacred Lotus, Oriental Lotus-lily, Pink Lotus
Nemophila aphylla — Baby Blue Eyes
Nepeta cataria — Catnip, Catmint
Nephrolepis cordifolia — Narrow Sword Fern, Tuber Sword Fern, Fishbone Fern, Ladder Fern
Nerium oleander — Oleander
Nestronia umbellula — Nestronia, Conjurer's-nut, Leechbush
Neviusia alabamensis — Alabama Snow-wreath, Neviusia
Nicandra physalodes — Apple-of-Peru
Nolina georgiana — Georgia Beargrass, Sandhills Lily
Nothoscordum bivalve — False Garlic, Grace Garlic
Nuphar lutea ssp. advena — Broadleaf Pondlily, Cow-lily, Spatterdock, Yellow Pond Lily
Nuphar lutea ssp. sagittifolia — Narrowleaf Pondlily, Cow-lily, Spatterdock, Bonnets
Nuttallanthus canadensis — Oldfield Toadflax, Common Toadflax
Nuttallanthus texanus — Texas Toadflax
Nymphaea elegans — Tropical Blue Water-lily
Nymphaea mexicana — Yellow Water-lily, Banana Water-lily
Nymphaea odorata ssp. odorata — Fragrant White Water-lily, American Water-lily, Sweet Water-lily
Nymphoides aquatica — Big Floating Heart, Banana Floating Heart
Nymphoides cordata — Little Floating Heart
Nymphoides cristata — Crested Floating Heart, Water Snowflake
Nymphoides peltata — Yellow Floating Heart
Nyssa aquatica — Water Tupelo, Cotton Gum, Tupelo Gum
Nyssa biflora — Swamp Tupelo, Swamp Blackgum, Swamp Gum, Water Gum
Nyssa ogeche — Ogeechee Tupelo, Ogeechee Lime, Ogeechee Plum
Nyssa sylvatica — Blackgum, Black Tupelo, Sour Gum
Nyssa ursina — Bear Tupelo, Apalachicola Tupelo
Obolaria virginica — Pennywort
Oclemena acuminata — Whorled Wood Aster, Floral Wood Aster, Whorled Aster, Whorled Nodding-aster
Oclemena reticulata — Pine-barren Aster, Whitetop Aster
Oenanthe javanica — Water Celery, Water Parsley, Java Dropwort, Seri
Oenothera argillicola — Shale-barren Evening Primrose, Shale Evening Primrose
Oenothera biennis — Common Evening Primrose
Oenothera drummondii — Beach Evening Primrose, Drummond's Evening Primrose
Oenothera fruticosa + — Northern Sundrops, Appalachian Sundrops
Oenothera fruticosa ssp. fruticosa — Southern Sundrops
Oenothera fruticosa ssp. glauca — Riverbank Evening Primrose, Riverbank Sundrops
Oenothera humifusa — Dunes Evening Primrose, Seabeach Evening Primrose, Spreading Evening Primrose
Oenothera laciniata — Cutleaf Evening Primrose
Oenothera linifolia — Threadleaf Sundrops, Flaxleaf Sundrops
Oenothera perennis — Little Sundrops, Small Sundrops
Oenothera speciosa — Showy Evening Primrose, White Evening Primrose, Pink-ladies
Oenothera triloba — Stemless Evening Primrose
Oldenlandia boscii — Bosc's Bluet
Oldenlandia corymbosa — Diamond-flower
Oligoneuron album — White Prairie-goldenrod, Upland White Aster
Oligoneuron riddellii — Riddell's Goldenrod
Oligoneuron rigidum var. glabratum — Southeastern Bold Goldenrod
Oligoneuron rigidum var. rigidum — Hard-leaved Goldenrod, Stiff Goldenrod, Midwestern Bold Goldenrod
Onoclea sensibilis — Sensitive Fern, Bead Fern
Onosmodium bejariense var. occidentale — Western Marbleseed
Onosmodium virginianum — Virginia Marbleseed, False Gromwell
Ophioglossum crotalophoroides var. crotalophoroides — Bulbous Adder's-tongue, Dwarf Adder's Tongue
Ophioglossum engelmannii — Engelmann's Adder's-tongue, Limestone Adder's-tongue
Ophioglossum nudicaule — Slender Adder's-tongue
Ophioglossum petiolatum — Longstem Adder's-tongue, Stalked Adder's-tongue Fern
Ophioglossum vulgatum — Southern Adder's-tongue
Ophiopogon japonicus — Mondo Grass, Black Mondo, Monkeygrass
Oplismenus hirtellus ssp. setarius — Woods-grass, Bristle Basketgrass
Oplismenus hirtellus ssp. undulatifolius — Wavyleaf Basketgrass
Opuntia dillenii — Coastal Prickly Pear, Shell Midden Prickly-pear, Yaaxpakan
Opuntia humifusa — Eastern Prickly Pear
Opuntia humifusa — Common Eastern Prickly Pear
Opuntia humifusa — Eastern Prickly Pear
Opuntia pusilla — Dune Prickly Pear, Dune Devil-joint, Devils-joint Cactus
Opuntia stricta — Coastal Prickly Pear, Shell Midden Prickly-pear
Orbexilum pedunculatum var. pedunculatum — Western Sampson's Snakeroot
Orbexilum pedunculatum var. psoralioides — Eastern Sampson's Snakeroot
Orbexilum virgatum — Pineland Leatherroot, Slender Leatherroot, Pineland Scurf-pea
Ornithogalum nutans — Drooping Star of Bethlehem
Ornithogalum umbellatum — Star of Bethlehem
Orobanche minor — Lesser Broomrape
Orobanche ramosa — Branching Broomrape, Hemp Broomrape
Orobanche uniflora — One-flowered Cancer-root, One-flowered Broomrape
Orontium aquaticum — Golden Club, Never-wet, Bog Torches
Osmanthus americanus var. americanus — Devilwood, Wild Olive
Osmanthus fragrans — Fragrant Tea Olive
Osmorhiza claytonii — Bland Sweet Cicely, Hairy Sweet Cicely
Osmorhiza longistylis — Anise-root, Smooth Sweet Cicely
Osmunda cinnamomea var. cinnamomea — Cinnamon Fern
Osmunda claytoniana — Interrupted Fern
Osmunda regalis var. spectabilis — American Royal Fern
Ostrya virginiana var. virginiana — American Hop-hornbeam, Ironwood, Eastern Hop-hornbeam
Ottelia alismoides — Duck lettuce
Oxalis corniculata — Creeping Lady's-sorrel
Oxalis debilis var. corymbosa — pink woodsorrel
Oxalis dillenii — Southern Yellow Wood-sorrel
Oxalis grandis — Large Wood-sorrel, Great Yellow Wood-sorrel
Oxalis montana — Mountain Wood-sorrel, American Wood-sorrel, Wood Shamrock, White Wood-sorrel
Oxalis priceae ssp. colorea — tufted yellow wood-sorrel
Oxalis priceae ssp. colorea — tufted yellow wood-sorrel, Small's wood-sorrel, (NOT Sadie Price‚Äôs Yellow Wood-sorrel)
Oxalis priceae ssp. priceae — Sadie Price‚Äôs Yellow Wood-sorrel
Oxalis rubra — windowbox wood-sorrel
Oxalis stricta — Common Yellow Wood-sorrel
Oxalis violacea — Violet Wood-sorrel
Oxycaryum cubense — Cuban Bulrush
Oxydendrum arboreum — Sourwood, Sorrel-tree
Oxypolis canbyi — Canby's Cowbane, Canby's Dropwort
Oxypolis filiformis — Water Dropwort
Oxypolis rigidior — Cowbane, Pig-potato, Stiff Cowbane
Oxypolis ternata — Savanna Cowbane
Pachysandra procumbens — Allegheny Spurge, Mountain Pachysandra
Pachysandra terminalis — Pachysandra, Japanese Spurge
Packera anonyma — Small's Ragwort, Squaw-weed, Appalachian Ragwort
Packera aurea — Golden Ragwort, Heartleaf Ragwort
Packera glabella — Butterweed, Smooth Ragwort, Yellowtop
Packera millefolium — Blue Ridge Ragwort, Yarrowleaf Ragwort, Divided-leaf Ragwort
Packera obovata — Roundleaf Ragwort, Roundleaf Groundsel, Spatulate-leaved Ragwort, Running Ragwort
Packera paupercula — Balsam Ragwort, Northern Meadow Groundsel
Packera paupercula — Ragwort, Groundsel
Packera plattensis — Appalachian Ragwort
Packera schweinitziana — Robbins' Ragwort, New England Ragwort, New England Groundsel
Packera serpenticola — Buck Creek Ragwort
Packera tomentosa — Woolly Ragwort
Paederia foetida — Skunk-vine
Panax quinquefolius — American Ginseng, Sang
Panax trifolius — Dwarf Ginseng
Panicum amarum var. amarulum — Southern Seabeach Grass
Panicum amarum var. amarum — Seaside Panicum, Bitter Seabeach Grass
Panicum anceps — Beaked Panicum, Beaked Panicgrass
Panicum anceps — Small Beaked Panicum, Small Beaked Panicgrass
Panicum capillare — Witchgrass, Old-witch grass, Tumbleweed, Tickle Grass
Panicum dichotomiflorum var. dichotomiflorum — Fall Panicum, Fall Panicgrass, Spreading Panicgrass
Panicum repens — Torpedo Grass
Panicum rigidulum var. rigidulum — Redtop Panic Grass
Panicum rigidulum var. rigidulum — Dense Panic Grass
Panicum virgatum var virgatum — Blunt Panic Grass
Panicum virgatum var. virgatum — Switchgrass , Prairie Switchgrass
Papaver dubium — Long-headed Poppy, Blind Eyes
Papaver rhoeas — Corn Poppy, Field Poppy, Red Poppy, Flanders Poppy
Papaver somniferum — Opium Poppy, Breadseed Poppy
Parapholis incurva — Sickle Grass, Hard Grass, Thin-tail
Parietaria floridana — Florida Pellitory
Parkinsonia aculeata — Jerusalem Thorn, Crown-of-Thorns, Horse-bean, Mexican Palo Verde
Parnassia asarifolia — Kidneyleaf Grass-of-Parnassus, Appalachian Grass-of-Parnassus, Brook Parnassia
Parnassia caroliniana — Carolina Grass-of-Parnassus, Savanna Parnassia, Eyebright
Parnassia grandifolia — Bigleaf Grass-of-Parnassus, Limeseep Parnassia
Paronychia argyrocoma — Silverling, Silver Whitlow-wort
Paronychia canadensis — Forked Chickweed, Canada Whitlow-wort
Paronychia virginica — Yellow Nailwort, Virginia Whitlow-wort
Parthenium hysterophorus — Santa Maria Feverfew
Parthenium integrifolium var. integrifolium — Common Wild Quinine
Parthenocissus quinquefolia — Virginia Creeper
Parthenocissus vitacea — Thicket Creeper, Woodbine
Paspalidium geminatum + — Alligator Grass, Paspalidium
Paspalum bifidum — Pitchfork Paspalum, Pitchfork Crown Grass
Paspalum conjugatum — Sour Paspalum
Paspalum dilatatum — Dallis Grass
Paspalum floridanum — Florida Paspalum
Paspalum fluitans — Water Paspalum, Horsetail Crown Grass
Paspalum laeve — field paspalum
Paspalum notatum var. notatum — Bahia Grass
Paspalum praecox — Crown Grass
Paspalum quadrifarium — Tussock Paspalum
Paspalum urvillei — Vasey Grass
Paspalum vaginatum — Sand Knotgrass, Seashore Crown Grass
Passiflora incarnata — Passionflower, Maypop
Passiflora lutea — Yellow Passionflower
Pastinaca sativa — Parsnip
Paulownia tomentosa — Princess Tree, Empress Tree, Royal Paulownia
Paxistima canbyi — Canby's Mountain Lover, Ratstripper, Cliff-green
Pectis prostrata — spreading chinchweed
Pedicularis canadensis ssp. canadensis — Wood Betony, Eastern Lousewort, Fernleaf
Pedicularis lanceolata — Swamp Lousewort
Pediomelum canescens — Buckroot, Eastern Prairie-turnip, Hoary Scurfpea
Pediomelum subacaule — Nashville Breadroot
Pellaea atropurpurea — Purple Cliffbrake
Pellaea ternifolia ssp. arizonica — Arizona Cliffbrake
Pellaea wrightiana — Wright's Cliffbrake
Peltandra sagittifolia — White Arrow-arum, White Arum, Spoonflower
Peltandra virginica — Green Arrow-arum, Tuckahoe
Pennisetum alopecuroides — Chinese Fountaingrass
Pennisetum ciliare — Buffelgrass
Pennisetum glaucum — Pearl Millet
Pennisetum setaceum — Tender Fountaingrass
Penstemon australis — Downy Beardtongue, Sandhill Beardtongue, Southern Beardtongue, Southeastern Beardtongue
Penstemon calycosus — Longsepal Beardtongue
Penstemon canescens — Appalachian Beardtongue, Gray's Beardtongue
Penstemon digitalis — Foxglove Beardtongue, Tall White Beardtongue
Penstemon dissectus — Georgia Beardtongue, Grit Beardtongue
Penstemon hirsutus — Northeastern Beardtongue, Hairy Beardtongue
Penstemon laevigatus — Smooth Beardtongue, Eastern Beardtongue
Penstemon multiflorus — Manyflower Beardtongue
Penstemon pallidus — Pale Beardtongue, Eastern White Beardtongue
Penstemon smallii — Small's Penstemon, Blue Ridge Beardtongue, Small's Beardtongue
Pentalinon luteum — hammock viper's-tail, Wild Allamanda
Penthorum sedoides — Ditch Stonecrop, American Penthorum
Peperomia pellucida — Pepper-elder, Man-to-man, Rat-ear
Perilla frutescens var. frutescens — Beefsteak Plant, Perilla
Periploca graeca — Silkvine
Persea borbonia — Red Bay
Persea palustris — Swamp Bay
Phacelia bipinnatifida — Fernleaf Phacelia, Purple Phacelia, Forest Phacelia
Phacelia dubia var. dubia — Appalachian Phacelia, Small-flowered Scorpion Weed
Phacelia dubia var. georgiana — Georgia Phacelia
Phacelia fimbriata — Fringed Phacelia, Blue Ridge Phacelia
Phacelia maculata — Flatrock Phacelia, Spotted Phacelia
Phacelia purshii — Miami-mist
Phalaris arundinacea — Reed Canarygrass, Ribbongrass
Phalaris canariensis — Canarygrass, Birdseed Grass
Phanopyrum gymnocarpon — Swamp Phanopyrum, Savanna Phanopyrum
Phaseolus polystachios var. polystachios — Wild Bean, Wild Kidney Bean
Phaseolus polystachios var. sinuatus — Sandhills Bean, Trailing Wild Bean
Phegopteris hexagonoptera — Broad Beech Fern
Phellodendron amurense — Northern Cork-tree, Amur Cork-tree, Japanese Cork-tree
Phemeranthus mengesii — Menges' Fameflower, Large-flowered Fameflower, Menges' Rock-pink, Large-flowered Rock-pink
Phemeranthus mengesii — Piedmont Rock-pink
Phemeranthus teretifolius — Appalachian Fameflower, Appalachian Rock-pink, Rock Portulaca
Philadelphus coronarius — European Mock-orange, Sweet Mock-orange
Philadelphus hirsutus — Hairy Mock-orange, Cumberland Mock-orange
Philadelphus inodorus — Appalachian Mock-orange
Philadelphus pubescens + — Ozark Mock-orange, Hairy Mock-orange
Philydrum lanuginosum — Woolly Frogsmouth, Frogmouth, Woolly Waterlily
Phlebodium aureum — Goldfoot Fern, Golden Polypody
Phleum pratense — Timothy
Phlox amoena ssp. amoena — Hairy Phlox, Chalice Phlox
Phlox amplifolia — Broadleaf Phlox
Phlox bifida ssp. bifida — Cleft Phlox, Sand Phlox
Phlox buckleyi — Swordleaf Phlox, Shale-barren Phlox
Phlox carolina + — Carolina Phlox , Thick-leaf Phlox, Giant Phlox
Phlox divaricata + — Eastern Blue Phlox, Timber Phlox, Blue Woodland Phlox
Phlox drummondii ssp. drummondii — Annual Phlox , Drummond Phlox
Phlox glaberrima + — Smooth Phlox
Phlox latifolia — Mountain Phlox, Appalachian Phlox, Allegheny Phlox
Phlox maculata ssp. maculata — Northern Meadow Phlox
Phlox maculata ssp. pyramidalis — Leafy Meadow Phlox, Wild Sweet William
Phlox nivalis + — Pineland Phlox, Trailing Phlox
Phlox paniculata — Garden Phlox, Summer Phlox, Fall Phlox, Smooth Phlox
Phlox pilosa + — Downy Phlox
Phlox stolonifera — Creeping Phlox
Phlox subulata + — Moss Phlox, Mountain-pink
Phoradendron leucarpum — American Mistletoe, Christmas Mistletoe
Photinia floribunda — Purple Chokeberry
Photinia melanocarpa — Black Chokeberry
Photinia pyrifolia — Red Chokeberry
Photinia serratifolia — Taiwanese Redtip
Photinia Xfraseri — Fraser's Photinia, Redtip Photinia
Phragmites australis — Common Reed
Phryma leptostachya — American Lopseed
Phyla lanceolata — Marsh Frogfruit, Northern Frogfruit
Phyla nodiflora — Creeping Frogfruit, Capeweed, Turkey-tangle
Phyllanthus caroliniensis ssp. caroliniensis — Carolina Leaf-flower
Phyllanthus tenellus — Mascarene Island Leaf-flower
Phyllanthus urinaria — Chamber Bitter
Phyllostachys aurea — Golden Bamboo, Fishpole Bamboo
Phyllostachys aureosulcata — Yellow-groove Bamboo
Phyllostachys bambusoides — Giant Timber Bamboo, Japanese Timber Bamboo
Phyllostachys edulis — Moso Bamboo
Phyllostachys makinoi — Makinoi Bamboo
Phyllostachys nigra — Black Bamboo
Phyllostachys rubromarginata — reddish bamboo
Physalis angulata — Smooth Ground-cherry, Cutleaf Ground-cherry
Physalis grisea — Gray Ground-cherry, Strawberry-tomato, Dwarf Cape-gooseberry
Physalis heterophylla var. heterophylla — Clammy Ground-cherry
Physalis longifolia var. subglabrata — Longleaf Ground-cherry
Physalis pubescens var. integrifolia — Thinleaf Downy Ground-cherry
Physalis pubescens var. pubescens — Thickleaf Downy Ground-cherry
Physalis virginiana var. virginiana — Virginia Ground-cherry
Physalis walteri — Dune Ground-cherry, Sand Ground-cherry
Physocarpus opulifolius var. opulifolius — Flowering Ninebark, Eastern Ninebark
Physostegia angustifolia — Narrowleaf Obedient-plant
Physostegia leptophylla — Tidal Marsh Obedient-plant, Swamp Obedient-plant, Narrowleaf Obedient-plant, False Dragonhead
Physostegia purpurea — Savanna Obedient-plant, Eastern False Dragonhead
Physostegia virginiana ssp. praemorsa — Southern Obedient-plant
Physostegia virginiana ssp. virginiana — Northern Obedient-plant, False Dragonhead, Obedient-plant
Phytolacca americana var. americana — Common Pokeweed, Poke
Phytolacca americana var. rigida — Maritime Pokeweed
Picea abies — Norway Spruce
Picea rubens — Red Spruce, He Balsam
Pieris floribunda — Evergreen Mountain Fetterbush, Mountain Andromeda
Pieris japonica — Japanese Andromeda, Lily-of-the-Valley Bush
Pieris phillyreifolia — Vine-wicky, Climbing Fetterbush, Climbing Wicky
Pilea microphylla — Rockweed, Artillery Weed
Pilea pumila var. pumila — Greenfruit Clearweed, Richweed, Coolwort
Piloblephis rigida — Florida Pennyroyal, Wild Pennyroyal
Pimpinella saxifraga ssp. saxifraga — Burnet-saxifrage
Pinckneya bracteata — Fevertree, Pinkneya
Pinellia ternata — Pinellia, Crow-dipper
Pinguicula caerulea — Blue Butterwort
Pinguicula lutea — Yellow Butterwort
Pinguicula pumila — Small Butterwort
Pinus clausa — Sand Pine
Pinus echinata — Shortleaf Pine, Yellow Pine, Rosemary Pine
Pinus elliottii var. elliottii — Slash Pine
Pinus glabra — Spruce Pine, Walter's Pine
Pinus palustris — Longleaf Pine, Georgia Pine, Southern Pine
Pinus pungens — Table Mountain Pine, Burr Pine, Hickory Pine
Pinus resinosa — Red Pine
Pinus rigida — Pitch Pine
Pinus serotina — Pond Pine, Pocosin Pine, Marsh Pine
Pinus strobus — Eastern White Pine
Pinus taeda — Loblolly Pine, Old Field Pine
Pinus virginiana — Virginia Pine, Scrub Pine, Jersey Pine
Piptochaetium avenaceum — Green Needlegrass, Blackseed Needlegrass, Eastern Needlegrass, Black Oatgrass
Piriqueta cistoides ssp. caroliniana — Piriqueta, Pitted Stripeseed
Pistia stratiotes — Water Lettuce
Pittosporum tobira — Japanese Pittosporum, Australian Laurel
Pityopsis aspera var. adenolepis — Grass-leaved Golden-aster, Grassleaf Aster
Pityopsis aspera var. aspera — Pineland Silkgrass, Sticky Golden-aster, Grassleaf Aster, Grass-leaved Golden-aster
Pityopsis graminifolia var. graminifolia — narrowleaf silkgrass, Grass-leaved Golden-aster, Grassleaf Aster
Pityopsis graminifolia var. latifolia — Grass-leaved Golden-aster, Grassleaf Aster
Pityopsis graminifolia var. tenuifolia — Grass-leaved Golden-aster, Grassleaf Aster
Pityopsis oligantha — Narrow-leaved Golden-aster, Few-flowered Golden-aster
Pityopsis pinifolia — Sandhills Golden-aster, Taylor County Golden-aster
Pityopsis ruthii — Ruth's Golden-aster
Planera aquatica — Water-elm, Planer-tree
Plantago arenaria — Sand Plantain, Leafy-stemmed Plantain
Plantago aristata — Bracted Plantain, Large-bracted Plantain, Buckhorn Plantain
Plantago cordata — Heartleaf Plantain, King-root
Plantago heterophylla — Many-seeded Plantain, Small Plantain
Plantago lanceolata — English Plantain, Buckhorn Plantain, Rib-grass
Plantago major — Common Plantain, White Man's Foot
Plantago rugelii var. rugelii — American Plantain, Broad-leaved Plantain, Blackseed Plantain, Red-stemmed Plantain
Plantago virginica — Virginia Plantain, Southern Plantain, Paleseed Plantain
Plantago wrightiana — Wright's Plantain
Platanthera blephariglottis var. blephariglottis — Small White Fringed Orchid
Platanthera blephariglottis var. conspicua — Large White Fringed Orchid, Southern White Fringed Orchid
Platanthera ciliaris — Yellow Fringed Orchid
Platanthera clavellata — Small Green Wood Orchid, Club-spur Orchid, Woodland Orchid, Streamhead Orchid
Platanthera cristata — Crested Fringed Orchid, Golden Fringed Orchid
Platanthera flava var. flava — Tubercled Orchid, Southern Rein Orchid, Southern Gypsy-spike
Platanthera flava var. herbiola — Tubercled Rein Orchid, Northern Gypsy-spike
Platanthera grandiflora — Large Purple Fringed Orchid, Plume-royal
Platanthera integra — Yellow Fringeless Orchid, Golden Frog Orchid, Golden Fringeless Orchid
Platanthera integrilabia — Monkey-face Orchid, White Fringeless Orchid
Platanthera lacera — Green Fringed Orchid, Ragged Fringed Orchid, Ragged Orchid
Platanthera nivea — Snowy Orchid, Bog-spike
Platanthera orbiculata — Large Round-leaved Orchid, Dinner-plate Orchid
Platanthera peramoena — Purple Fringeless Orchid, Purple Spire Orchid, Pride-of-the-peak
Platanthera psycodes — Small Purple Fringed Orchid, Butterfly Orchid
Platanus occidentalis — Sycamore, Planetree
Platanus Xhispanica [occidentalis X orientalis] — London Planetree
Platycladus orientalis — Oriental Arborvitae, Tree-of-life
Pleea tenuifolia — Rush-featherling, Pleea
Pleopeltis polypodioides ssp. michauxiana — Resurrection Fern, Scaly Polypody
Pluchea camphorata — Camphorweed, Camphor Pluchea, Marsh Fleabane
Pluchea foetida var. foetida — Stinking Fleabane, Marsh Fleabane, Stinking Camphorweed, Common Wild Quinine
Pluchea odorata var. odorata — Saltmarsh Fleabane, Camphorweed
Pluchea rosea — Marsh Fleabane, Rosy Camphorweed
Poa annua — Annual Bluegrass, Six-weeks Grass, Speargass
Poa autumnalis — Autumn Bluegrass
Poa compressa — Canada Bluegrass
Poa cuspidata — early bluegrass
Poa pratensis ssp. pratensis — Kentucky Bluegrass, Junegrass, Speargrass
Poa trivialis — Rough Bluegrass
Podophyllum peltatum — May-apple, American Mandrake
Podostemum ceratophyllum — Riverweed, Threadfoot, Riffleweed
Pogonia ophioglossoides — Rose Pogonia, Snakemouth Orchid, Beardflower, Addermouth
Polemonium reptans var. reptans — Spreading Jacob's Ladder, Greek Valerian
Polemonium vanbruntiae — Appalachian Jacob's Ladder
Polygala ambigua — Loose Milkwort
Polygala balduinii — White Milkwort, Baldwin's Milkwort
Polygala boykinii var. boykinii — Boykin's Milkwort
Polygala cruciata var. cruciata — Southern Drumheads, Cross-leaved Milkwort
Polygala curtissii — Appalachian Milkwort, Curtiss' Milkwort
Polygala cymosa — Tall Milkwort, Tall Pinebarren Milkwort
Polygala grandiflora var. grandiflora — Showy Milkwort
Polygala hookeri — Hooker's Milkwort
Polygala incarnata — Pink Milkwort, Procession Flower
Polygala lutea — Orange Milkwort, Red-hot-poker, Candyroot
Polygala mariana — Maryland Milkwort
Polygala nana — Dwarf Milkwort, Candyroot
Polygala paucifolia — Gaywings, Fringed Polygala
Polygala polygama — Southern Bitter Milkwort, Racemed Milkwort
Polygala ramosa — Short Pinebarren Milkwort, Low Pinebarren Milkwort, Dwarf Milkwort, Savanna Milkwort
Polygala sanguinea — Field Milkwort, Blood Milkwort
Polygala senega — Seneca Snakeroot
Polygala setacea — Coastal Plain Milkwort
Polygala verticillata + — Whorled Milkwort
Polygonatum biflorum var. commutatum — Solomon's Seal, Smooth Solomon's Seal
Polygonatum pubescens — Solomon's Seal, Hairy Solomon's Seal
Polygonella americana — Southern Jointweed, Showy Jointweed
Polygonella fimbriata — Sandhill Jointweed, Fringed Thysanella
Polygonella polygama — October-flower
Polygonum amphibium + — Water Smartweed
Polygonum arifolium — Halberd-leaf Tearthumb
Polygonum aviculare — Prostrate Knotweed
Polygonum baldschuanicum — Lace Vine, Silver-lace-vine, China Fleece-vine
Polygonum cespitosum var. longisetum — Longbristle Smartweed, Bristly Lady‚Äôs-thumb, Tufted Knotweed
Polygonum cilinode — Fringed Climbing Buckwheat, Fringed Black Bindweed, Fringed Bindweed
Polygonum convolvulus var. convolvulus — Climbing Buckwheat, Nimblewill, Black Bindweed
Polygonum cuspidatum — Japanese Knotweed
Polygonum erectum — Erect Knotweed
Polygonum glabrum — Dense-flowered Smartweed
Polygonum hydropiperoides — Mild Waterpepper
Polygonum lapathifolium — Dockleaf Smartweed, Willow-weed, Pale Smartweed
Polygonum orientale — Kiss-me-over-the-garden-gate, Prince's Feather, Prince's-plume
Polygonum pensylvanicum — Pennsylvania Smartweed, Pinkweed
Polygonum perfoliatum — Asiatic Tearthumb, Mile-a-minute-vine
Polygonum persicaria — Lady's-thumb, Heart's-ease
Polygonum polystachyum — Himalayan Knotweed, Kashmir Plume, cultivated knotweed
Polygonum punctatum var. punctatum — Dotted Smartweed
Polygonum sachalinense — Giant Knotweed, Sachaline
Polygonum sagittatum — Arrowleaf Tearthumb, Arrowvine
Polygonum scandens var. cristatum — Crested Climbing Buckwheat, Climbing False Buckwheat
Polygonum scandens var. scandens — Common Climbing Buckwheat
Polygonum setaceum — Swamp Smartweed
Polygonum virginianum — Jumpseed
Polymnia canadensis — Small-flowered Leafcup, White-flowered Leafcup
Polymnia laevigata — Tennessee Leafcup
Polypodium appalachianum — Appalachian Rockcap Fern, Appalachian Polypody
Polypodium virginianum — Common Rockcap Fern, Rock Polypody
Polypogon monspeliensis — Rabbitfoot Grass, Beardgrass, Annual Beardgrass
Polypremum procumbens — Rustweed, Polypremum, Juniperleaf
Polystichum acrostichoides var. acrostichoides — Christmas Fern
Poncirus trifoliata — Trifoliate Orange, Hardy Orange
Pontederia cordata — Heartleaf Pickerelweed, Wampee
Pontederia cordata — Lanceleaf Pickerelweed
Ponthieva racemosa — Shadow Witch, Ponthieu's Orchid, Shadow-witch Orchid
Populus alba — White Poplar, Silver Poplar
Populus deltoides ssp. deltoides — Eastern Cottonwood
Populus grandidentata — Bigtooth Aspen, Large-toothed Aspen
Populus heterophylla — Swamp Cottonwood
Populus nigra — European Black Poplar, Lombardy Poplar, Black Poplar
Populus tremuloides — Quaking Aspen
Populus Xjackii [balsamifera X deltoides] — Balm-of-Gilead
Portulaca amilis — Broadleaf Pink Purslane, Paraguayan Purslane
Portulaca oleracea — Common Purslane, Garden Purslane, Pussley
Portulaca pilosa — Rose purslane, Kiss-me-quick
Portulaca smallii — Small's Portulaca
Potamogeton crispus — Curly Pondweed, Curled Pondweed, Curly-leaf Pondweed
Potamogeton diversifolius — Common Snailseed Pondweed
Potamogeton pulcher — Spotted Pondweed, Heartleaf Pondweed
Potentilla argentea var. argentea — Silvery Cinquefoil, Silvery Five-fingers, Hoary Five-fingers
Potentilla canadensis var. canadensis — Dwarf Cinquefoil, Running Five-fingers
Potentilla norvegica ssp. monspeliensis — Strawberry-weed, Rough Cinquefoil, Norwegian Cinquefoil
Potentilla recta — Rough-fruited Cinquefoil, Sulphur Cinquefoil, Sulphur Five-fingers
Potentilla simplex — Old Field Cinquefoil, Old-field Five-fingers, Common Cinquefoil
Prenanthes alba — White Lettuce, Northern Rattlesnake-root
Prenanthes altissima — Tall White Lettuce, Tall Rattlesnake-root
Prenanthes autumnalis — Slender Rattlesnake-root, One-sided Rattlesnake-root
Prenanthes barbata — Barbed Rattlesnake-root, Flatwoods Rattlesnake-root
Prenanthes roanensis — Roan Rattlesnake-root, Appalachian Rattlesnake-root
Prenanthes serpentaria — Lion's-foot, Gall-of-the-Earth
Prenanthes trifoliolata — Gall-of-the-earth
Prosartes lanuginosa — Yellow Mandarin, Yellow Fairybells
Prosartes maculata — Nodding Mandarin, Spotted Mandarin
Proserpinaca palustris var. crebra — Common Mermaid-weed
Prunella vulgaris ssp. lanceolata — American Heal-all, American Self-heal
Prunella vulgaris ssp. vulgaris — Eurasian Self-heal, Eurasian Heal-all
Prunus alabamensis — Alabama Black Cherry
Prunus americana — American Plum, Wild Plum
Prunus angustifolia var. angustifolia — Chickasaw Plum
Prunus avium — Mazzard Cherry, Sweet Cherry, Bing Cherry
Prunus caroliniana — Carolina Cherry Laurel, Carolina Laurel Cherry
Prunus hortulana — Hortulan Plum, Wild-goose Plum
Prunus mahaleb — Mahaleb Cherry, Perfumed Cherry, St. Lucie Cherry, Rock Cherry
Prunus mexicana — Big-tree Plum, Mexican Plum
Prunus pensylvanica var. pensylvanica — Fire Cherry, Pin Cherry
Prunus persica — Peach
Prunus serotina var. serotina — Black Cherry
Prunus susquehanae — Appalachian Sand Cherry, Susquehanna Cherry, Appalachian Dwarf-cherry
Prunus umbellata var. umbellata — Hog Plum, Flatwoods Plum
Prunus virginiana var. virginiana — Choke Cherry, Common Chokecherry
Prunus Xyedoensis [subhirtella X speciosa] — Yoshino Cherry
Pseudognaphalium helleri ssp. helleri — Heller's Rabbit Tobacco
Pseudognaphalium obtusifolium ssp. obtusifolium — Fragrant Rabbit Tobacco, Sweet Everlasting, Catfoot
Pseudolysimachion longifolium — Garden Speedwell, Longleaf Speedwell
Pseudosasa japonica — Arrow Bamboo
Ptelea trifoliata + — Wafer-ash, Hoptree
Pteridium aquilinum + — Bracken, Brake
Pteris multifida — Spider Brake, Wall Fern, Huguenot Fern
Pteris vittata — Ladder Brake
Pterocaulon pycnostachyum — Black Snakeroot, Blackroot, Wingstem
Pteroglossaspis ecristata — Spiked Medusa, Crestless Plume Orchid, Smooth-lipped Eulophia, Non-crested Eulophia
Ptilimnium capillaceum — Eastern Bishopweed, Atlantic Bishopweed, Atlantic Mock Bishop's Weed
Ptilimnium costatum — Big Bishopweed
Pueraria montana var. lobata — Kudzu, Foot-a-Day
Pycnanthemum albescens — White-leaved Mountain-mint, White Mountain-mint
Pycnanthemum beadlei — Beadle's Mountain-mint
Pycnanthemum clinopodioides — basil mountain-mint
Pycnanthemum flexuosum — Savanna Mountain-mint
Pycnanthemum incanum + — Hoary Mountain-mint, White Mountain-mint
Pycnanthemum montanum — Appalachian Mountain-mint
Pycnanthemum muticum — Short-toothed Mountain-mint, Downy Mountain-mint
Pycnanthemum nudum — Smooth Mountain-mint
Pycnanthemum pycnanthemoides + — Woodland Mountain-mint
Pycnanthemum setosum — awned mountain-mint
Pycnanthemum tenuifolium — Narrowleaf Mountain-mint, Slender Mountain-mint, Savanna Mountain-mint
Pycnanthemum torrei — Torrey's Mountain-mint
Pycnanthemum verticillatum var. verticillatum — whorled mountain-mint
Pycnanthemum virginianum — Virginia Mountain-mint
Pyracantha coccinea — Pyracantha, Scarlet Firethorn
Pyrrhopappus carolinianus — Carolina False Dandelion
Pyrularia pubera — Buffalo-nut, Oil-nut
Pyrus calleryana — Bradford Pear, Callery Pear
Pyrus communis — Common Pear
Pyxidanthera barbulata — Common Pyxie-moss, Big Pyxie
Pyxidanthera brevifolia — Sandhills Pyxie-moss, Wells' Pyxie-moss, Little Pyxie
Quercus acutissima — Sawtooth Oak
Quercus alba — White Oak
Quercus arkansana — Arkansas Oak
Quercus austrina — Bluff Oak, Bastard White Oak
Quercus bicolor — Swamp White Oak
Quercus boyntonii — Boynton Sand Post Oak, Boynton Oak
Quercus buckleyi — Buckley Oak
Quercus chapmanii — Chapman Oak
Quercus coccinea + — Scarlet Oak
Quercus falcata — Southern Red Oak, Spanish Oak
Quercus geminata — Sand Live Oak
Quercus georgiana — Georgia Oak
Quercus hemisphaerica + — Darlington Oak, Sand Laurel Oak
Quercus ilicifolia — Bear Oak, Scrub Oak
Quercus imbricaria — Shingle Oak
Quercus incana — Bluejack Oak
Quercus laevis — Turkey Oak
Quercus laurifolia — Laurel Oak, Swamp Laurel Oak, Diamond Leaf Oak
Quercus lyrata — Overcup Oak, Swamp White Oak
Quercus macrocarpa var. macrocarpa — Bur Oak, Mossycup Oak
Quercus margarettae — Sand Post Oak, Scrub Post Oak
Quercus marilandica var. marilandica — Blackjack Oak
Quercus michauxii — Swamp Chestnut Oak, Basket Oak
Quercus minima — Dwarf Live Oak
Quercus muehlenbergii — Chinquapin Oak, Yellow Chestnut Oak
Quercus myrtifolia — Myrtle Oak
Quercus nigra — Water Oak
Quercus oglethorpensis — Oglethorpe Oak
Quercus pagoda — Cherrybark Oak, Swamp Spanish Oak
Quercus palustris — Pin Oak
Quercus phellos — Willow Oak
Quercus prinoides — Dwarf Chinquapin Oak
Quercus prinus — Rock Chestnut Oak, Tanbark Oak
Quercus pumila — Running Oak
Quercus rubra + — Northern Red Oak, Red Oak
Quercus shumardii var. shumardii — Shumard Oak, Swamp Red Oak
Quercus similis — Swamp Post Oak, Bottomland Post Oak, Delta Oak
Quercus sinuata var. breviloba — Bastard Oak
Quercus sinuata var. sinuata — Bastard Oak, Durand's White Oak
Quercus stellata — Post Oak
Quercus texana — Nuttall Oak, Texas Red Oak
Quercus velutina — Black Oak
Quercus virginiana — Live Oak
Ranunculus abortivus — Kidneyleaf Buttercup, Small-flowered Buttercup, Kidney-leaved Crowfoot, Small-flowered Crowfoot
Ranunculus acris var. acris — Tall Buttercup, Bitter Buttercup
Ranunculus allegheniensis — Mountain Crowfoot, Allegheny Buttercup
Ranunculus ambigens — Water-plantain Crowfoot, Water-plantain Spearwort
Ranunculus arvensis — Corn Crowfoot, Hungerweed
Ranunculus bulbosus — Bulbous Buttercup
Ranunculus fascicularis — Early Buttercup, Thick-root Butterdup
Ranunculus ficaria var. bulbifera — Fig Buttercup, Lesser Celandine, Pilewort
Ranunculus ficaria var. bulbifera — Fig Buttercup, Lesser Celandine, Pilewort
Ranunculus ficaria var. bulbifera — Fig Buttercup, Lesser Celandine, Pilewort
Ranunculus ficaria var. bulbifera — Fig Buttercup, Lesser Celandine, Pilewort
Ranunculus ficaria var. bulbifera — Fig Buttercup, Lesser Celandine, Pilewort
Ranunculus harveyi — Harvey's buttercup
Ranunculus hispidus var. caricetorum — Northern Swamp Buttercup, Marsh Buttercup
Ranunculus hispidus var. hispidus — Hispid Buttercup, Hairy Buttercup
Ranunculus hispidus var. nitidus — Carolina Buttercup, Swamp Buttercup
Ranunculus laxicaulis — Coastal Plain Spearwort
Ranunculus micranthus — Small-flowered Buttercup, Rock Buttercup
Ranunculus muricatus — spinyfruit buttercup
Ranunculus parviflorus — Small-flowered Buttercup, Stickseed Crowfoot
Ranunculus pusillus var. pusillus — Low Spearwort
Ranunculus recurvatus var. recurvatus — Hooked Buttercup, Hooked Crowfoot
Ranunculus repens — Creeping Buttercup
Ranunculus sardous — Sardinian Buttercup, Hairy Buttercup
Ranunculus sceleratus var. sceleratus — Cursed Buttercup, Celery-leaf Crowfoot, Cursed Crowfoot
Raphanus raphanistrum — Wild Radish, Jointed Charlock, White Charlock
Ratibida columnifera — Mexican Hat, Columnar Prairie Coneflower, Upright Coneflower, Long-headed Coneflower
Ratibida pinnata — Grey-headed Coneflower, Globular Prairie Coneflower
Rhamnus cathartica — Common Buckthorn
Rhapidophyllum hystrix — Needle Palm, Blue Palmetto
Rhexia alifanus — Smooth Meadowbeauty, Savanna Meadowbeauty
Rhexia aristosa — Awned Meadowbeauty, Bristly Meadowbeauty
Rhexia cubensis — West Indies Meadowbeauty
Rhexia lutea — Yellow Meadowbeauty, Golden Meadowbeauty
Rhexia mariana var. interior — Maryland meadowbeauty
Rhexia mariana var. mariana — Pale Meadowbeauty, Maryland Meadowbeauty, Dull Meadowbeauty
Rhexia mariana var. mariana — White Meadowbeauty
Rhexia mariana var. ventricosa — Swollen Meadowbeauty
Rhexia nashii — Hairy Meadowbeauty, Maid Marian, Nash's Meadowbeauty
Rhexia nuttallii — Nuttall's Meadowbeauty
Rhexia petiolata — Ciliate Meadowbeauty, Short-stemmed Meadowbeauty, Fringed Meadowbeauty, Bog Meadowbeauty
Rhexia virginica — Virginia Meadowbeauty, Wingstem Meadowbeauty, Deergrass
Rhizophora mangle — Red Mangrove
Rhodiola rosea — Roseroot
Rhododendron alabamense — Alabama Azalea
Rhododendron arborescens — Sweet Azalea, Smooth Azalea
Rhododendron atlanticum — Dwarf Azalea, Coastal Azalea
Rhododendron austrinum — Florida Flame Azalea, Yellow Azalea
Rhododendron calendulaceum — Flame Azalea
Rhododendron canescens — Piedmont Azalea, Southern Pinxterbloom Azalea, Wild Azalea
Rhododendron carolinianum — Carolina Rhododendron, Punctatum
Rhododendron catawbiense — Catawba Rhododendron, Mountain Rosebay, Purple Laurel, Pink Laurel
Rhododendron cumberlandense — Cumberland Azalea, Baker's Azalea
Rhododendron eastmanii — May White Azalea, Eastman's Azalea
Rhododendron flammeum — Oconee Azalea
Rhododendron maximum — Rosebay Rhododendron, Great Laurel, White Rosebay, Great Rhododendron
Rhododendron minus — Gorge Rhododendron, Punctatum, Piedmont Rhododendron, (Carolina Rhododendron)
Rhododendron oblongifolium — Texas Azalea
Rhododendron periclymenoides — Pinxterflower, Pinxterbloom Azalea, Election Pink, Pinxter Azalea
Rhododendron prinophyllum — Election Pink, Roseshell Azalea, Early Azalea
Rhododendron prunifolium — Plumleaf Azalea
Rhododendron vaseyi — Pinkshell Azalea
Rhododendron viscosum — Swamp Azalea, Clammy Azalea, Swamp Honeysuckle, Catch-fly Azalea
Rhodotypos scandens — Jetbead
Rhus aromatica var. aromatica — Fragrant Sumac, Squawbush
Rhus copallinum + — Winged Sumac, Shining Sumac, Dwarf Sumac
Rhus glabra — Smooth Sumac, Common Sumac
Rhus michauxii — Michaux's Sumac, Dwarf Sumac, False Poison Sumac
Rhus typhina — Staghorn Sumac
Rhynchosia difformis — Snoutbean
Rhynchosia reniformis — Dollarweed, Dollarleaf, Roundleaf Snoutbean
Rhynchosia tomentosa var. tomentosa — Twining Snoutbean, Erect Snoutbean
Rhynchospora caduca — Angle-stem Beaksedge
Rhynchospora capitellata — Brownish Beaksedge
Rhynchospora colorata — Narrowleaf Whitetop Sedge, White-bracted Sedge
Rhynchospora globularis — Globe Beaksedge
Rhynchospora harperi — Harper's Beaksedge
Rhynchospora inundata — Narrow-fruit Horned Beaksedge
Rhynchospora latifolia — Broadleaf Whitetop Sedge, Giant White-topped Sedge, White-bracted Sedge
Rhynchospora megalocarpa — Sandy-field Beaksedge, Sandhill Beaksedge
Rhynchospora miliacea — Millet Beaksedge
Rhynchospora recognita — Cymose Beakrush
Rhynchospora tracyi — Tracy's Beaksedge
Ribes americanum — Wild Black Currant, American Black Currant
Ribes curvatum — Granite Gooseberry
Ribes cynosbati — Prickly Gooseberry, Dogberry
Ribes echinellum — Miccosukee Gooseberry, Spiny Gooseberry, Florida Gooseberry
Ribes glandulosum — Skunk Currant, Mountain Currant
Ribes rotundifolium — Roundleaf Gooseberry, Appalachian Gooseberry
Richardia brasiliensis — Brazilian-clover, tropical Mexican-clover
Richardia grandiflora — Largeflower Mexican-clover, Largeflower Richardia
Richardia scabra — Rough Mexican-clover
Ricinus communis — Castor-bean, Castor-oil Plant, Palma Christi
Robinia hispida var. fertilis — Arnot Bristly Locust
Robinia hispida var. hispida — Common Bristly Locust
Robinia hispida var. kelseyi — Kelsey's Locust
Robinia hispida var. nana — Dwarf Bristly Locust, Dwarf Locust
Robinia hispida var. rosea — Boynton's Locust
Robinia pseudoacacia — Black Locust
Robinia viscosa var. hartwegii — Granite Dome Locust, Highlands Locust, Hartwig's Locust
Robinia viscosa var. viscosa — Clammy Locust
Rorippa austriaca — Austrian Yellowcress
Rorippa palustris ssp. palustris — Marshcress, Bog Yellowcress
Rosa bracteata — McCartney Rose, Chickasaw Rose
Rosa canina — Dog Rose
Rosa carolina var. carolina — Carolina Rose
Rosa laevigata — Cherokee Rose
Rosa multiflora — Multiflora Rose
Rosa palustris — Swamp Rose
Rosa rubiginosa — Sweetbriar Rose, Eglantine Rose
Rosa rugosa — Japanese Rose, Rugosa Rose, Beach Rose
Rosa setigera — Climbing Prairie Rose
Rosa virginiana var. virginiana — Virginia Rose
Rosa wichuraiana — Memorial Rose, Dorothy Perkins Rose, Lucie Rose
Rosa Xdamascena — Damask Rose
Rosmarinus officinalis — Rosemary
Rotala ramosior — Toothcup
Rotala rotundifolia — Roundleaf Toothcup, Dwarf Rotala
Rottboellia cochinchinensis — Itch-grass
Rubus allegheniensis var. allegheniensis — Allegheny Blackberry
Rubus argutus — Pennsylvania Blackberry, Highbush Blackberry, Southern Blackberry
Rubus armeniacus — Himalayan Blackberry, Armenian Blackberry
Rubus bifrons — European Blackberry, Himalaya-berry, Himalayan Blackberry
Rubus canadensis — Thornless Blackberry, Smooth Blackberry
Rubus cuneifolius — Sand Blackberry
Rubus flagellaris — Common Dewberry, Northern Dewberry
Rubus hispidus — Swamp Dewberry
Rubus idaeus ssp. strigosus — Red Raspberry
Rubus laciniatus — Cut-leaved Blackberry, Evergreen Blackberry
Rubus occidentalis — Black Raspberry
Rubus odoratus var. odoratus — Purple-flowering Raspberry, Thimbleberry
Rubus pascuus — Chesapeake Blackberry, Topsy Blackberry
Rubus phoenicolasius — Wineberry
Rubus trivialis — Southern Dewberry, Coastal Plain Dewberry
Rudbeckia fulgida + — Orange Coneflower, Eastern Coneflower
Rudbeckia heliopsidis — Sunfacing Coneflower, Pineywoods Coneflower
Rudbeckia hirta var. angustifolia — Coastal Plain Black-eyed Susan
Rudbeckia hirta var. hirta — Woodland Black-eyed Susan
Rudbeckia hirta var. pulcherrima — Weedy Black-eyed Susan
Rudbeckia laciniata var. digitata — Blue Ridge Cutleaf Coneflower
Rudbeckia laciniata var. digitata — Coastal Plain Cutleaf Coneflower
Rudbeckia laciniata var. laciniata — Green-headed Coneflower, Common Cutleaf Coneflower, Green Coneflower, Goldenglow
Rudbeckia maxima — Giant Coneflower
Rudbeckia mollis — Soft-haired Coneflower, Woolly Coneflower
Rudbeckia nitida — Narrow-leaved Coneflower, St. John's Black-eyed Susan, Shiny Coneflower
Rudbeckia subtomentosa —
Rudbeckia triloba var. rupestris — Blue Ridge Three-lobed Coneflower, Brown-eyed Susan
Rudbeckia triloba var. triloba — Common Three-lobed Coneflower, Brown-eyed Susan, Thin-Leaved Coneflower
Ruellia caerulea — Mexican Bluebell
Ruellia caroliniensis ssp. caroliniensis var. caroliniensis — Carolina Wild Petunia, Common Wild Petunia, Hairy Ruellia
Ruellia caroliniensis ssp. ciliosa var. cinerascens — Sandhills Wild Petunia
Ruellia humilis — Hairy Wild Petunia, Low Wild Petunia, Glade Wild Petunia
Ruellia noctiflora — Night-flowering Wild Petunia, Night-blooming Wild Petunia
Ruellia pedunculata ssp. pinetorum — Pineland Wild Petunia
Ruellia purshiana — Pursh's Wild Petunia
Ruellia strepens — Limestone Wild Petunia, Glade Wild Petunia
Rugelia nudicaulis — Rugel's Ragwort, Rugelia, Rugel's Indian Plantain
Rumex acetosella — Sheep Sorrel, Field Sorrel, Red Sorrel, Sourgrass
Rumex crispus ssp. crispus — Curly Dock
Rumex hastatulus — Wild Dock, Sourgrass, Heartwing Sorrel, Wild Sorrel
Rumex obtusifolius — Broadleaf Dock, Bitter Dock
Rumex patientia — Patience Dock, Monk's-rhubarb
Rumex pulcher — Fiddle Dock
Sabal minor — Dwarf Palmetto, Bush Palmetto, Dwarf Blue Palmetto, Bluestem Palmetto
Sabal palmetto — Cabbage Palmetto
Sabatia angularis — Rose-pink, Bitterbloom, Common Marsh-pink
Sabatia bartramii — Bartram's Rose-gentian
Sabatia brachiata — Narrowleaf Rose-pink, Narrowleaf Rose-gentian, Narrowleaf Sabatia
Sabatia calycina — Coastal Rose-pink, Coastal Rose Gentian
Sabatia campanulata — Slender Marsh-pink, Slender Rose-gentian
Sabatia capitata — Cumberland Rose-gentian, Appalachian Rose-gentian
Sabatia difformis — White Sabatia, Lanceleaf Rose-gentian, Lanceleaf Sabatia
Sabatia dodecandra var. dodecandra — Perennial Sea-pink, Large Marsh Rose-pink
Sabatia dodecandra var. foliosa — Marsh Rose-gentian
Sabatia gentianoides — Pinewoods Rose-gentian, Pinewoods Rose-pink
Sabatia grandiflora — Largeflower Rose-gentian
Sabatia kennedyana — Plymouth Gentian
Sabatia quadrangula — Four-angle Sabatia, Four-angle Rose-gentian
Sabatia stellaris — Annual Sea-pink, Common Marsh-pink, Rose-of-Plymouth
Saccharum alopecuroides — Silver Plumegrass
Saccharum baldwinii — Narrow Plumegrass
Saccharum brevibarbe var. brevibarbe — Short-bearded Plumegrass
Saccharum brevibarbe var. contortum — Bent-awn Plumegrass
Saccharum coarctatum — Brown Plumegrass
Saccharum giganteum — Sugarcane Plumegrass, Giant Plumegrass
Saccharum ravennae — Ravenna Grass, Hardy Pampas Grass
Sacciolepis indica — Indian Cupscale
Sacciolepis striata — American Cupscale
Sageretia minutiflora — Shell-mound Buckthorn, Small-flowered Buckthorn
Sagittaria australis — Appalachian Arrowhead, Southern Arrowhead
Sagittaria engelmanniana — Engelmann's arrowhead
Sagittaria fasciculata — Bunched Arrowhead
Sagittaria graminea var. graminea — Grassleaf Arrowhead
Sagittaria isoetiformis — Depression Meadow Arrowhead
Sagittaria lancifolia ssp. lancifolia — Duck Potato
Sagittaria lancifolia ssp. media — Duck Potato
Sagittaria latifolia — Broadleaf Arrowhead, Duck Potato
Salicornia depressa — Perennial Glasswort, Woody Glasswort, Samphire
Salix alba — European White Willow
Salix babylonica — Weeping Willow
Salix caprea — Goat Willow, Great Sallow
Salix caroliniana — Carolina Willow, Coastal Plain Willow
Salix cinerea — Gray Willow
Salix discolor — Pussy Willow
Salix fragilis — Crack Willow, Brittle Willow
Salix humilis var. humilis — Prairie Willow, Upland Willow
Salix humilis var. tristis — Dwarf Upland Willow, Sage Willow
Salix matsudana — Corkscrew Willow
Salix nigra — Black Willow
Salix sericea — Silky Willow, Shrub Willow, Satin Willow
Salsola kali ssp. kali — Northern Saltwort
Salsola kali ssp. pontica — Southern Saltwort, Carolina Saltwort
Salsola tragus — Russian Thistle, Tumbleweed
Salvia azurea var. azurea — Azure Sage
Salvia leucantha — Mexican Bush Sage
Salvia lyrata — Lyreleaf Sage
Salvia sclarea — Europe sage, clary sage
Salvia urticifolia — Nettleleaf Sage
Salvinia minima — Water Spangles, Floating Fern
Salvinia molesta — Giant Salvinia
Sambucus nigra ssp. canadensis — Common Elderberry, American Elder
Sambucus racemosa var. racemosa — Red Elderberry, Red-berried Elder, Eastern Red Elderberry
Samolus valerandi ssp. parviflorus — Water-pimpernel, Brookweed
Sanguinaria canadensis — Bloodroot, Red Puccoon
Sanguisorba canadensis — Canada Burnet, American Burnet, White Burnet
Sanguisorba minor ssp. balearica — Salad Burnet, Garden Burnet, Fodder Burnet
Sanicula canadensis var. canadensis — Canada Sanicle, Black Snakeroot
Sanicula canadensis var. canadensis — Florida Sanicle, Florida Snakeroot
Sanicula canadensis var. grandis — Large Sanicle
Sanicula marilandica — Black Snakeroot, Maryland Sanicle
Sanicula odorata — Clustered Snakeroot, Clustered Sanicle, Yellow-flowered Snakeroot, Fragrant Snakeroot
Sanicula smallii — Small's Sanicle, Southern Sanicle, Snakeroot
Sanicula trifoliata — Long-fruited Snakeroot, Beaked Sanicle, Large-fruited Sanicle
Sapindus saponaria var. drummondii — Western Soapberry
Sapindus saponaria var. saponaria — Florida Soapberry
Saponaria officinalis — Soapwort, Bouncing Bet
Sarcocornia perennis — Woody Glasswort, Perennial Glasswort
Sarracenia flava — Yellow Pitcherplant, Yellow Trumpet, Trumpets
Sarracenia leucophylla — White-topped Pitcherplant, Crimson Pitcherplant
Sarracenia minor — Hooded Pitcherplant
Sarracenia oreophila — Mountain Green Pitcherplant, Green Pitcherplant, Mountain Pitcherplant
Sarracenia psittacina — Parrot Pitcherplant
Sarracenia purpurea ssp. gibbosa — Northern Purple Pitcherplant
Sarracenia purpurea ssp. purpurea var. montana — Southern Appalachian Purple Pitcherplant, Sidesaddle Flower
Sarracenia purpurea ssp. purpurea var. purpurea — Southern Purple Pitcherplant, Frog's Breeches, Hunter's Cup
Sarracenia rubra ssp. jonesii — Mountain Sweet Pitcherplant
Sarracenia rubra ssp. rubra — Sweet Pitcherplant, Redflower Pitcherplant, Red Pitcherplant
Sassafras albidum — Sassafras
Saururus cernuus — Lizard's Tail, Water-dragon
Saxifraga careyana — Carey's Saxifrage
Saxifraga caroliniana — Carolina Saxifrage
Saxifraga michauxii — Cliff Saxifrage, Michaux's Saxifrage
Saxifraga michauxii — Saxifrage
Saxifraga micranthidifolia — Brook Lettuce, Mountain Lettuce, Branch Lettuce, Lettuceleaf Saxifrage
Saxifraga virginiensis var. virginiensis — Early Saxifrage
Schedonorus arundinaceus — Tall Fescue, Alta Fescue
Schedonorus pratensis — Meadow Fescue
Schefflera actinophylla — Umbrella Tree, Octopus Tree, Schefflera
Schisandra glabra — Bay Star-vine, Climbing-magnolia, Magnolia-vine
Schizachyrium scoparium var. scoparium — Little Bluestem
Schizachyrium scoparium var. stoloniferum — Creeping Little Bluestem
Schoenocaulon dubium — Florida Feathershank
Schoenolirion albiflorum — White Sunnybell
Schoenolirion croceum — Yellow Sunnybell
Schoenolirion wrightii — Texas Sunnybell
Schoenoplectiella mucronata — Roughseed Bulrush, Bog Bulrush, Ricefield Bulrush
Schoenoplectus californicus — Giant Bulrush, Southern Bulrush, Tule
Schoenoplectus pungens var. pungens — Common Threesquare, Chairmaker's Rush, Swordgrass
Schoenoplectus robustus — Saltmarsh Bulrush
Schoenoplectus tabernaemontani — Softstem Bulrush, Great Bulrush
Schwalbea americana — Chaffseed
Scirpus atrovirens — Black Bulrush
Scirpus cyperinus — Woolgrass Bulrush, Marsh Bulrush
Scirpus georgianus — Georgia Bulrush
Scirpus polyphyllus — Leafy Bulrush
Scleranthus annuus — Knawel, Annual Knawel
Scleria ciliata var. ciliata — Broad-leaved Hairy Nutrush
Scleria oligantha — Few-flowered Nutrush
Scleria pauciflora + — Papillose Nutrush, Carolina Nutrush
Scleria triglomerata — Tall Nutrush, Stone-rush, Whip Nutrush
Sclerolepis uniflora — Sclerolepis, Pink bogbutton
Scrophularia lanceolata — Hare Figwort, American Figwort
Scrophularia marilandica — Eastern Figwort, Carpenter's Square
Scutellaria arguta — Appalachian Skullcap, Blue Ridge Skullcap
Scutellaria elliptica var. elliptica — Hairy Skullcap, Elliptic-leaved Skullcap
Scutellaria elliptica var. hirsuta — Hairy Skullcap
Scutellaria incana var. australis — Hoary Skullcap, Downy Skullcap
Scutellaria incana var. incana — Hoary Skullcap, Downy Skullcap
Scutellaria incana var. punctata — Hoary Skullcap, Downy Skullcap
Scutellaria integrifolia — Hyssop Skullcap, Narrow-leaved Skullcap
Scutellaria lateriflora var. lateriflora — Mad-dog Skullcap
Scutellaria montana — Large-flowered Skullcap
Scutellaria multiglandulosa — Small's Skullcap
Scutellaria nervosa — Veined Skullcap, Bottomland Skullcap
Scutellaria ocmulgee — Ocmulgee Skullcap
Scutellaria ovata ssp. bracteata — Heartleaf Skullcap
Scutellaria ovata ssp. ovata — Heartleaf Skullcap
Scutellaria ovata ssp. rugosa — Heartleaf Skullcap
Scutellaria parvula var. missouriensis — Shale-barren Skullcap, Glade Skullcap
Scutellaria parvula var. parvula — Dwarf Skullcap
Scutellaria pseudoserrata — falseteeth skullcap
Scutellaria saxatilis — Rock Skullcap
Scutellaria serrata — Showy Skullcap, Serrate Skullcap
Secale cereale — Cereal Rye
Securigera varia — Crown-vetch
Sedum acre — Mossy Stonecrop, Wallpepper, Bitter Stonecrop, Gold-moss
Sedum glaucophyllum — Cliff Stonecrop
Sedum nevii — Nevius's Stonecrop
Sedum pulchellum — Widow's Cross, Glade Stonecrop, Rock Moss, Lime Stonecrop
Sedum pusillum — Puck's Orpine, Granite Stonecrop
Sedum sarmentosum — Stringy Stonecrop
Sedum ternatum — Mountain Stonecrop, Wild Stonecrop, Three-leaf Stonecrop
Selaginella apoda — Meadow Spikemoss
Selaginella ludoviciana — Louisiana Spikemoss, Gulf Spikemoss
Selaginella rupestris — Rock Spikemoss
Selaginella tortipila — Twisted-hair Spikemoss
Senecio jacobaea — Tansy Ragwort
Senecio vulgaris — Common Groundsel
Senna hebecarpa — Northern Wild Senna, American Senna
Senna marilandica — Maryland Wild Senna
Senna obtusifolia — Coffeeweed, Sicklepod
Serenoa repens — Saw Palmetto
Sericocarpus asteroides — Toothed White-topped Aster
Sericocarpus linifolius — Narrowleaf White-topped Aster, Slender White-topped Aster
Sericocarpus tortifolius — Twisted-leaf White-topped Aster, Dixie White-topped Aster
Sesbania herbacea — Sesban, Coffee-weed, Indigo-weed, Hemp Sesbania
Sesbania punicea — Rattlebush, Purple Sesban, Scarlet Wisteria-tree
Sesbania vesicaria — Bladderpod, Bagpod
Sesuvium maritimum — Small Sea-purslane, Slender Sea-purslane
Sesuvium portulacastrum — Large Sea-purslane, Shoreline Sea-purslane
Setaria corrugata — coastal bristlegrass
Setaria faberi — Nodding Foxtail Grass, Giant Foxtail-grass
Setaria italica — Yellow Foxtail, Italian Millet, Foxtail Millet
Setaria magna — Saltmarsh Foxtail-grass, Giant Foxtail-grass, Giant Bristlegrass
Setaria parviflora — Perennial Foxtail-grass, Knotroot Bristlegrass
Setaria pumila ssp. pallidefusca — Yellow Foxtail
Setaria verticillata — Hooked Bristlegrass
Setaria viridis var. major — Giant Green Foxtail
Setaria viridis var. viridis — Green Foxtail, Green Bristlegrass
Seymeria cassioides — Senna Seymeria
Seymeria pectinata + — Seymeria
Sherardia arvensis — Field Madder, Blue Field Madder
Shortia galacifolia var. galacifolia — Oconee Bells, Southern Shortia
Sibara virginica — Sibara, Virginia-cress
Sibbaldiopsis tridentata — Wine-leaf Cinqefoil, Mountain Cinqefoil, Three-toothed Cinqefoil, Mountain White Potentilla
Sicyos angulatus — Bur Cucumber, Star Cucumber, Nimble-Kate
Sida elliottii — Coastal Plain Sida
Sida rhombifolia — Arrowleaf Sida, Cuban Jute, Diamondleaf Fanpetal
Sida spinosa — Prickly Mallow, Prickly Sida, False-mallow
Sideroxylon lanuginosum ssp. lanuginosum — Eastern Gum Bumelia, Eastern Gum Bully
Sideroxylon lycioides — Buckthorn Bumelia, Buckthorn Bully
Sideroxylon tenax — Tough Bumelia, Tough Buckthorn, Tough Bully
Sideroxylon thornei — Thorne's Bumelia, Swamp Bumelia
Silene antirrhina — Sleepy Catchfly, Garter-pink
Silene armeria — Sweet William Catchfly, Garden Catchfly
Silene caroliniana ssp. caroliniana — South Carolina Wild-pink, Rock Catchfly, Carolina Pink
Silene caroliniana ssp. pensylvanica — Northern Wild-pink, Sticky Catchfly, Pennsylvania Catchfly
Silene dichotoma — Forked Catchfly
Silene latifolia ssp. alba — White Campion, Evening Campion, White Cockle, Evening Lychnis
Silene nivea — Snowy Campion
Silene noctiflora — Night-flowering Catchfly, Sticky Campion, Sticky Cockle
Silene ovata — Mountain Catchfly, Fringed Campion
Silene polypetala — Eastern Fringed Campion, Eastern Fringed Catchfly
Silene regia — Royal Catchfly
Silene stellata — Starry Campion, Widow's-frill
Silene virginica var. robusta — Large Fire-pink
Silene virginica var. virginica — Fire-pink
Silene vulgaris — Bladder Campion, Maiden's-tears
Silphium asteriscus + — Starry Rosinweed
Silphium asteriscus var. asteriscus — Starry Rosinweed
Silphium compositum var. compositum — Kidneyleaf Rosinweed, Rhubarb-leaved Rosinweed, Compass Plant
Silphium compositum var. reniforme — Ragged Rosinweed, Kidneyleaf Rosinweed
Silphium integrifolium + — Prairie Rosinweed
Silphium laciniatum — Compass-plant
Silphium mohrii — Shaggy Rosinweed
Silphium perfoliatum var. connatum — Virginia Cup-plant
Silphium perfoliatum var. perfoliatum — Common Cup-plant, Indian Cup
Silphium pinnatifidum — Cutleaf Prairie-dock, Tansy Rosinweed
Silphium simpsonii — Simpson's rosinweed
Silphium terebinthinaceum + — Prairie-dock, Broadleaf Prairie-dock
Silphium trifoliatum var. latifolium — Whorled Rosinweed
Silphium trifoliatum var. trifoliatum — Whorled Rosinweed
Silybum marianum — Milk-thistle, Blessed-thistle
Sisymbrium altissimum — Tumble Mustard, Jim Hill Mustard
Sisymbrium officinale — Hedge Mustard
Sisyrinchium albidum — Pale Blue-eyed Grass
Sisyrinchium angustifolium — Blue-eyed Grass, Stout Blue-eyed Grass
Sisyrinchium atlanticum — Atlantic Blue-eyed Grass
Sisyrinchium dichotomum — White Irisette, Isothermal Irisette
Sisyrinchium fuscatum — Sandyland Blue-eyed-grass
Sisyrinchium fuscatum — Bristly Blue-eyed Grass
Sisyrinchium mucronatum — Blue-eyed Grass
Sisyrinchium rosulatum — Annual Blue-eyed Grass, Lawn Blue-eyed Grass
Sium suave — Water-parsnip
Smallanthus uvedalius — Bearsfoot, Yellow Leafcup
Smilax auriculata — Dune Greenbrier
Smilax biltmoreana — Biltmore Carrionflower
Smilax bona-nox — Catbrier, Saw Greenbrier, Bullbrier, Tramp's Trouble
Smilax ecirrhata — upright carrionflower
Smilax glauca — Whiteleaf Greenbrier, Wild Sarsaparilla, Sawbrier
Smilax herbacea — Common Carrionflower
Smilax hugeri — Huger's Carrionflower
Smilax lasioneura — Midwestern Carrionflower
Smilax laurifolia — Bamboo-vine, Blaspheme-vine, Wild Bamboo, Bayvine
Smilax pseudochina — Coastal Carrionflower, Bamboo-vine
Smilax pulverulenta — downy carrionflower
Smilax pumila — Dwarf Smilax, Sarsaparilla-vine
Smilax rotundifolia — Common Greenbrier, Common Catbrier, Bullbrier, Horsebrier
Smilax smallii — Sweet-scented Smilax, Unarmed Catbrier, Jackson-brier
Smilax tamnoides — Bristly Greenbrier, Hellfetter, China-root
Smilax walteri — Coral Greenbrier, Red-berried Swamp Smilax
Solanum americanum — Common Nightshade, American Black Nightshade
Solanum carolinense var. carolinense — Horse Nettle, Bull Nettle, Ball Nettle
Solanum diphyllum — Paired-leaf Nightshade, twoleaf nightshade
Solanum dulcamara var. dulcamara — Bittersweet, Deadly Nightshade
Solanum nigrum — European Black Nightshade
Solanum physalifolium — Hairy Nightshade
Solanum pseudocapsicum — Jerusalem Cherry
Solanum ptycanthum — American Black Nightshade
Solanum rostratum — Buffalo-bur, Kansas-thistle
Solanum sisymbriifolium — Sticky Nightshade
Solanum tampicense — Wetland Nightshade, Aquatic Soda Apple
Solanum torvum — Turkeyberry
Solanum viarum — Tropical Soda Apple
Solidago altissima — Tall Goldenrod, Field Goldenrod, Common Goldenrod
Solidago arguta var. arguta — Forest Goldenrod, Sharp-leaved Goldenrod
Solidago arguta var. arguta — Goldenrod
Solidago arguta var. boottii — Boott's Goldenrod
Solidago arguta var. caroliniana — Vasey's Goldenrod
Solidago auriculata — Eared Goldenrod
Solidago bicolor — Silverrod, White Goldenrod
Solidago caesia — Bluestem Goldenrod, Wreath Goldenrod, Axillary Goldenrod, Bridal-wreath Goldenrod
Solidago canadensis var. canadensis — Northern Common Goldenrod
Solidago canadensis var. hargeri — Harger's Common Goldenrod
Solidago curtisii — Curtis' Goldenrod
Solidago erecta — Slender Goldenrod, Erect Goldenrod
Solidago faucibus — Gorge Goldenrod
Solidago fistulosa — Hairy Pineywoods Goldenrod, Shaggy Pineywoods Goldenrod
Solidago flaccidifolia — Appalachian Goldenrod, mountain goldenrod
Solidago flexicaulis — Zigzag Goldenrod, Broad-leaved Goldenrod
Solidago gigantea — Smooth Goldenrod, Late Goldenrod
Solidago glomerata — Skunk Goldenrod, Cluster Goldenrod
Solidago gracillima — Southern Bog Goldenrod, Graceful Goldenrod
Solidago gracillima — Southern Bog Goldenrod
Solidago hispida var. hispida — Hairy Goldenrod
Solidago juncea — Early Goldenrod
Solidago nemoralis var. nemoralis — Eastern Gray Goldenrod
Solidago odora var. chapmanii — Chapman's Goldenrod
Solidago odora var. odora — Sweet Goldenrod, Licorice Goldenrod, Fragrant Goldenrod
Solidago patula var. patula — Northern Roughleaf Goldenrod
Solidago petiolaris var. petiolaris — downy ragged goldenrod
Solidago pinetorum — Small's Goldenrod, Pineywoods Goldenrod
Solidago plumosa — Yadkin River Goldenrod
Solidago puberula var. puberula — Downy Goldenrod
Solidago puberula var. pulverulenta — Downy Goldenrod
Solidago pulchra — Carolina Goldenrod, Beautiful Goldenrod
Solidago roanensis — Roan Mountain Goldenrod
Solidago rugosa ssp. aspera — Wrinkle-leaf goldenrod
Solidago rugosa ssp. aspera — Cronquist's Goldenrod
Solidago rugosa ssp. aspera — Hackberry-leaf Goldenrod
Solidago rugosa ssp. rugosa var. rugosa — Wrinkle-leaf goldenrod, Rough-stemmed Goldenrod
Solidago rupestris — Riverbank Goldenrod, Rock Goldenrod
Solidago sempervirens var. mexicana — Southern Seaside Goldenrod
Solidago sempervirens var. sempervirens — Northern Seaside Goldenrod
Solidago simulans — Granite Dome Goldenrod, Cliffside Goldenrod
Solidago speciosa var. rigidiuscula — showy goldenrod
Solidago speciosa var. speciosa — Showy Goldenrod
Solidago sphacelata — Speckled Goldenrod, False Goldenrod, Limestone Goldenrod
Solidago spithamaea — Blue Ridge Goldenrod
Solidago squarrosa — Stout Goldenrod, Ragged Goldenrod, Squarrose Goldenrod
Solidago stricta — Wand Goldenrod, Slim Goldenrod
Solidago tortifolia — Leafy Pinelands Goldenrod, Leafy Pineywoods Goldenrod, twistleaf goldenrod
Solidago uliginosa var. uliginosa — Northern Bog Goldenrod, Swamp Goldenrod
Solidago ulmifolia var. ulmifolia — Elmleaf Goldenrod
Solidago verna — Spring-flowering Goldenrod, Spring Goldenrod
Sonchus arvensis ssp. arvensis — Field Sow-thistle, Perennial Sow-thistle
Sonchus arvensis ssp. uliginosus — Field Sow-thistle, Perennial Sow-thistle
Sonchus asper — Prickly Sow-thistle, Spiny-leaf Sow-thistle
Sonchus oleraceus — Annual Sow-thistle, Common Sow-thistle
Sophora japonica — Pagoda Tree
Sorbus americana — Mountain-ash, American Mountain-ash, American Rowan
Sorbus aucuparia — European Mountain-ash, Rowan
Sorghastrum elliottii — Elliot's Indiangrass, Slender Indiangrass, Nodding Indiangrass
Sorghastrum nutans — Yellow Indiangrass, Prairie Indiangrass
Sorghastrum secundum — Lopsided Indiangrass
Sorghum bicolor ssp. bicolor — Sorghum, Milo, Broomcorn, Sorgo
Sorghum halepense — Johnsongrass
Sparganium americanum — American Bur-reed
Spartina alterniflora — Saltmarsh Cordgrass, Smooth Cordgrass
Spermacoce assurgens — woodland false buttonweed
Spermacoce verticillata — Shrubby Buttonweed, Whitehead Broom, Boton Blanco
Sphagneticola trilobata — Wedelia
Sphenopholis intermedia — Slender Wedgegrass
Spigelia marilandica — Indian Pink, Woodland Pinkroot, Wormgrass
Spiraea alba var. alba — Narrowleaf Meadowsweet, Pipestem
Spiraea alba var. latifolia — Broadleaf Meadowsweet
Spiraea betulifolia var. corymbosa — Dwarf Spiraea, Rock Spiraea
Spiraea japonica var. fortunei — Japanese Spiraea
Spiraea thunbergii — Thunberg's meadowsweet
Spiraea tomentosa — Hardhack, Steeplebush
Spiraea virginiana — Virginia Spiraea, Appalachian Spiraea
Spiranthes brevilabris — Short-lipped Ladies'-tresses
Spiranthes cernua — Nodding Ladies'-tresses
Spiranthes eatonii — Eaton's Ladies'-tresses
Spiranthes floridana — Florida Ladies'-tresses
Spiranthes lacera var. gracilis — Southern Slender Ladies'-tresses
Spiranthes lacera var. lacera — Northern Slender Ladies'-tresses
Spiranthes laciniata — Lace-lip Ladies'-tresses, Lace-lip Spiral Orchid
Spiranthes longilabris — Long-lipped Ladies'-tresses, Giant Spiral Orchid
Spiranthes lucida — Shining Ladies'-tresses
Spiranthes magnicamporum — Great Plains Ladies'-tresses
Spiranthes ochroleuca — Yellow Ladies-tresses, Yellow Nodding Ladies'-tresses
Spiranthes odorata — Fragrant Ladies'-tresses, Marsh Ladies'-tresses
Spiranthes ovalis var. erostellata — Lesser Ladies'-tresses, Oval Ladies'-tresses
Spiranthes ovalis var. ovalis — Oval Ladies'-tresses
Spiranthes praecox — Grass-leaved Ladies'-tresses, Giant Ladies'-tresses
Spiranthes praecox — Woodland Ladies'-tresses, Pale Green Ladies'-tresses
Spiranthes tuberosa — Little Ladies'-tresses, Little Pearl-twist
Spiranthes vernalis — Spring Ladies'-tresses
Spirodela polyrrhiza — Greater Duckweed, Duckmeat, Minnow-fole, Giant Duckweed
Sporobolus clandestinus — Rough Dropseed
Sporobolus curtissii — Curtiss Dropseed
Sporobolus heterolepis — Prairie Dropseed
Sporobolus indicus var. indicus — Smut Grass, Blackseed
Sporobolus indicus var. pyramidalis — West Indian Dropseed
Sporobolus junceus — Sandhills Dropseed, Pineywoods Dropseed
Stachys annua — Annual Woundwort, Annual Hedgenettle
Stachys appalachiana — Appalachian hedgenettle
Stachys arvensis — Staggerweed
Stachys aspera — Rough-leaved Hedgenettle
Stachys byzantina — Lamb's-ear
Stachys clingmanii — Clingman's Hedgenettle
Stachys cordata — Heart-leaved Hedgenettle
Stachys cordata — Nuttall‚Äôs Hedgenettle
Stachys crenata — Mouse's-ear, Shade Betony
Stachys eplingii — Epling's Hedgenettle
Stachys floridana — Florida Betony, Rattlesnake-weed, Florida Hedgenettle
Stachys germanica — German hedgenettle
Stachys hyssopifolia — Hyssop-leaved Hedgenettle
Stachys hyssopifolia — hyssop-leaved hedgenettle
Stachys latidens — Broad-toothed Hedgenettle
Stachys palustris — marsh hedgenettle
Stachys pilosa var. arenicola — Woundwort
Stachys tenuifolia — Smooth Hedgenettle
Stachys tenuifolia — Hispid Hedgenettle
Staphylea trifolia — Bladdernut
Stellaria alsine — Bog Chickweed, Bog Stitchwort, Longstalk Starwort
Stellaria graminea — Lesser Stitchwort
Stellaria longifolia var. longifolia — Longleaf Stitchwort
Stellaria media ssp. media — Common Chickweed
Stellaria pubera — Giant Chickweed, Star Chickweed, Great Chickweed, Common Starwort
Stenanthium gramineum + — Featherbells
Stenaria nigricans var. nigricans — Diamond-flower, Glade Bluet
Stewartia malacodendron — Silky Camellia, Virginia Stewartia, Stewartia
Stewartia ovata — Mountain Camellia, Mountain Stewartia
Stillingia aquatica — Corkwood, Water Toothleaf
Stillingia sylvatica ssp. sylvatica — Queen's-delight
Stipulicida setacea var. setacea — Coastal Plain Wireplant
Stokesia laevis — Stoke's Aster, Blue Stokesia
Streptopus amplexifolius var. amplexifolius — Twisted Stalk, White Mandarin, Pagoda-bells
Streptopus lanceolatus var. lanceolatus — Rosy Twisted Stalk, Eastern Rose Mandarin, Eastern Twisted-stalk
Striga asiatica — Witchweed
Strophostyles helvola — Annual Sand Bean, Beach Pea, Trailing Wild Bean
Strophostyles umbellata — Perennial Sand Bean, Perennial Wild Bean, Pink Wild Bean
Stylisma aquatica — Water Dawnflower
Stylisma humistrata — Southern Dawnflower
Stylisma patens ssp. angustifolia — Narrowleaf Dawnflower
Stylisma patens ssp. patens — Sandhill Dawnflower, Sandhill Morning Glory
Stylisma pickeringii var. pickeringii — Pickering's Dawnflower, Pickering's Morning Glory
Stylodon carneus — Carolina Vervain, Carolina False Vervain
Stylophorum diphyllum — Celandine Poppy, Woods-poppy
Stylosanthes biflora — Pencil-flower
Styrax americanus — American Storax, American Snowbell
Styrax grandifolius — Bigleaf Snowbell, Large-leaved Storax
Symphoricarpos albus var. albus — Common Snowberry
Symphoricarpos orbiculatus — Coralberry, Indian Currant
Symphyotrichum concolor — Eastern Silvery Aster
Symphyotrichum cordifolium — Common Blue Wood Aster, Heart-leaved Aster
Symphyotrichum divaricatum — Midwestern Salt-marsh Aster
Symphyotrichum dumosum + — Bushy Aster, Long-stalked Aster, Rice-button Aster
Symphyotrichum elliotii — Elliott's Aster, Southern Swamp Aster
Symphyotrichum georgianum — Georgia Aster
Symphyotrichum grandiflorum — Big-headed Aster, Rough Aster, Large-headed Aster
Symphyotrichum laeve var. concinnum — Narrow-leaved Smooth Blue Aster
Symphyotrichum laeve var. laeve — Smooth Blue Aster
Symphyotrichum lanceolatum ssp. lanceolatum var. latifolium — Broad-leaved Panicled Aster
Symphyotrichum lateriflorum var. lateriflorum — Calico Aster, Starved Aster
Symphyotrichum lowrieanum — Smooth Heart-leaved Aster, Lowrie's Aster
Symphyotrichum novae-angliae — New England Aster
Symphyotrichum novi-belgii var. elodes — New York Aster
Symphyotrichum oblongifolium — Eastern Aromatic Aster, Shale-barren Aster
Symphyotrichum patens var. patens — Late Purple Aster, Common Clasping Aster, Late Blue Aster, Skydrop Aster
Symphyotrichum phlogifolium — Appalachian Clasping Aster
Symphyotrichum pilosum var. pilosum — Frost Aster, White Heath Aster
Symphyotrichum praealtum var. angustior — Willow Aster, Veiny Lined Aster, Tall Aster
Symphyotrichum prenanthoides — Crooked-stemmed Aster, Zigzag Aster
Symphyotrichum puniceum var. puniceum — Purple-stemmed Aster, Swamp Aster
Symphyotrichum racemosum — Small White Aster
Symphyotrichum retroflexum — Curtis' Aster
Symphyotrichum sericeum — Western Silvery Aster
Symphyotrichum shortii — Short's Aster, Midwestern Blue Heart-leaved Aster
Symphyotrichum subulatum — Eastern Salt-marsh Aster
Symphyotrichum tenuifolium — Perennial Salt-marsh Aster
Symphyotrichum undulatum — Wavyleaf Aster
Symphyotrichum urophyllum — White Arrowleaf Aster, Arrowleaf Blue Wood Aster
Symphyotrichum walteri — Walter's Aster
Symphytum asperum — Prickly Comfrey
Symplocarpus foetidus — Skunk Cabbage
Symplocos tinctoria — Horsesugar, Sweetleaf
Syngonanthus flavidulus — Yellow Hatpins, Bantam-buttons
Syringa vulgaris — Common Lilac, French Lilac
Taenidia integerrima — Yellow Pimpernel, Golden Alexander
Talinum paniculatum — Jewels-of-Opar
Tamarix africana — African Tamarisk
Tamarix canariensis — Canary Island Tamarisk
Tamarix chinensis — Chinese Tamarisk
Tamarix gallica — French Tamarisk
Tamarix parviflora — Small-flower Tamarisk
Tamarix ramosissima — Salt-cedar, Tamarisk
Tamarix tetragyna — Tamarix
Tanacetum balsamita — Mint-geranium
Tanacetum parthenium — Feverfew
Tanacetum vulgare — Common Tansy, Golden-buttons
Taraxacum laevigatum — Red-seeded Dandelion
Taraxacum officinale ssp. officinale — Common Dandelion
Taxodium ascendens — Pond Cypress
Taxodium distichum — Bald Cypress
Taxus canadensis — Canada Yew, American Yew
Tephrosia hispidula — sprawling hoarypea
Tephrosia spicata — Spiked Hoarypea, Brown-hair Tephrosia, Tawny Goat's Rue
Tephrosia virginiana — Virginia Goat's Rue, Devil's Shoestrings
Tetragonotheca helianthoides — Squarehead, Pineland-ginseng
Teucrium canadense + — American Germander, Wood Sage
Thalia dealbata — Powdery Thalia, Powdery Alligator-flag
Thalictrum aquilegifolium — Columbine Meadow-rue
Thalictrum clavatum — Mountain Meadow-rue, Lady-rue
Thalictrum coriaceum — Appalachian Meadow-rue, Maid of the Mist
Thalictrum dasycarpum — Purple Meadow-rue
Thalictrum debile — Trailing Meadow-rue
Thalictrum dioicum — Early Meadow-rue
Thalictrum macrostylum — Small-flowered Meadow-rue, Small-leaved Meadow-rue
Thalictrum pubescens — Common Tall Meadow-rue, King-of-the-meadow, Late Meadow-rue
Thalictrum revolutum — Skunk Meadow-rue, Waxy Meadow-rue
Thalictrum thalictroides — Windflower, Rue-anemone
Thaspium barbinode — Hairy-jointed Meadow Parsnip
Thaspium pinnatifidum — cutleaf meadowparsnip
Thaspium trifoliatum var. aureum — Meadow Parsnip, Woodland Parsnip
Thaspium trifoliatum var. trifoliatum — Purple Meadow Parsnip, Woodland Parsnip
Thelypteris dentata — Downy Maiden Fern, Soft Fern, Downy Shield Fern
Thelypteris kunthii — Kunth's Maiden Fern, Southern Shield Fern, Southern Wood Fern
Thelypteris noveboracensis — New York Fern
Thelypteris palustris var. pubescens — Marsh Fern
Thelypteris simulata — Bog Fern, Massachusetts Fern
Thermopsis fraxinifolia — Ash-leaf Golden-banner
Thermopsis mollis — Appalachian Golden-banner, Bush Pea
Thermopsis villosa — Aaron's Rod, Blue Ridge Golden-banner, Hairy Bush Pea
Thlaspi alliaceum — Garlic Penny-cress
Thlaspi arvense — Field Penny-cress, Frenchweed
Thuja occidentalis — American Arborvitae, Eastern Arborvitae, Northern White Cedar, Flat Cedar
Tiarella cordifolia var. collina — Common Foamflower, False Miterwort
Tiarella cordifolia var. cordifolia — Mountain Foamflower, False Miterwort
Tilia americana var. americana — American Basswood, Northern Basswood
Tilia americana var. caroliniana — Carolina Basswood, Southern Basswood
Tilia americana var. heterophylla — Mountain Basswood, White Basswood
Tilia cordata — Little-leaf Linden, Small-leaved Linden, Small-leaved Lime
Tillandsia recurvata — Ball-moss, Bunch-moss
Tillandsia usneoides — Spanish Moss
Tipularia discolor — Cranefly Orchid
Tithonia rotundifolia — Mexican Sunflower, Clavel de Muerto
Tofieldia glabra — Carolina Bog Asphodel, White Asphodel
Torilis arvensis ssp. arvensis — Spreading Hedge Parsley, Spreading Bur-parsley, Field Hedge Parsley
Torilis japonica — Japanese Hedge Parsley
Torreya taxifolia — Florida Torreya, Stinking-cedar
Toxicodendron pubescens — Poison Oak
Toxicodendron radicans ssp. radicans — Eastern Poison Ivy
Toxicodendron rydbergii — Wesern Poison Ivy
Toxicodendron vernix — Poison Sumac, Thunderwood
Trachelospermum difforme — Climbing Dogbane
Trachelospermum jasminoides — Confederate Jasmine, Star Jasmine
Tradescantia hirsuticaulis — Hairy Spiderwort
Tradescantia hirsutiflora — Hairy Spiderwort
Tradescantia ohiensis — Smooth Spiderwort
Tradescantia subaspera var. montana — Zigzag Spiderwort, Wide-leaved Spiderwort
Tradescantia virginiana — Virginia Spiderwort
Tragia urens — Wavyleaf Noseburn, Southeastern Noseburn
Tragia urticifolia — Nettleleaf Noseburn, Tragia
Tragopogon dubius — Vegetable Oyster, Yellow Salsify, Western Salsify, Yellow Goatsbeard
Tragopogon porrifolius — Salsify, Vegetable Oyster, Oyster Plant
Trapa natans — European Water Chestnut, Water Caltrop
Trautvetteria caroliniensis var. caroliniensis — Carolina Tassel-rue, False Bugbane
Trepocarpus aethusae — Whitenymph
Triadenum tubulosum — Southern Marsh St. Johnswort
Triadenum virginicum — Common Marsh St. Johnswort
Triadenum walteri — Walter‚Äôs Marsh St. Johnswort
Triadica sebifera — Popcorn Tree, Chinese Tallow-tree
Triantha glutinosa — Sticky Bog Asphodel, Northern Bog Asphodel, False Asphodel
Triantha racemosa — Coastal Bog Asphodel, Coastal False Asphodel, Southern Bog Asphodel, Savanna Asphodel
Tribulus cistoides — Jamaica Feverplant, Burr-nut
Tribulus terrestris — Puncture-weed, Caltrop, Devil's-thorn
Trichomanes boschianum — Appalachian Filmy Fern, Bristle Fern
Trichomanes petersii — Dwarf Filmy Fern, Bristle Fern, Peters' Filmy Fern
Trichophorum cespitosum — Deerhair Bulrush, Deergrass
Trichostema brachiatum — Glade Blue Curls, False Pennyroyal, Fluxweed
Trichostema dichotomum — Common Blue Curls
Trichostema setaceum — Narrowleaf Blue Curls
Tridens carolinianus — Carolina Triodia, Carolina Fluffgrass
Tridens flavus var. flavus — Purpletop, Purpletop Tridens, Greasy Grass, Tall Redtop
Tridens strictus — Longspike Tridens, Longspike Fluffgrass, Spike Triodia
Trientalis borealis ssp. borealis — Northern Starflower, Maystar
Trifolium arvense — Rabbitfoot Clover
Trifolium aureum — Large Hop Clover, Yellow Clover
Trifolium campestre — Hop Clover, Low Hop Clover, Field Clover
Trifolium carolinianum — Wild White Clover, Carolina Clover
Trifolium dubium — Least Hop Clover, Low Hop Clover
Trifolium fragiferum — Strawberry Clover
Trifolium hybridum — Alsike Clover
Trifolium incarnatum — Crimson Clover
Trifolium pratense — Red Clover
Trifolium reflexum — Buffalo Clover
Trifolium repens — White Clover, White Dutch Clover, Ladino Clover
Trifolium resupinatum — Persian Clover, Reversed Clover
Trifolium vesiculosum — Arrowleaf Clover
Trillium catesbaei — Catesby's Trillium, Rosy Wake-robin, Bashful Trillium, Rose Trillium
Trillium cernuum — Northern Nodding Trillium
Trillium cuneatum — Little Sweet Betsy, Purple Toadshade
Trillium decipiens — Chattahoochee Trillium, Deceptive Trillium
Trillium decumbens — Decumbent Trillium, Trailing Trillium
Trillium discolor — Pale Yellow Trillium, Faded Trillium, Small Yellow Toadshade, Savannah River Trillium
Trillium erectum — Wake-robin, Red Trillium, Stinking Willie, Stinking Benjamin
Trillium flexipes — Bent Trillium, Bent White Trillium, Bentstalk Trillium
Trillium grandiflorum — Large-flowered Trillium, White Wake-robin, Great White Trillium, Showy Wake-robin
Trillium lancifolium — Lanceleaf Trillium, Narrowleaf Trillium
Trillium ludovicianum — Louisiana Trillium, Louisiana Wake-robin
Trillium luteum — Yellow Trillium, Yellow Toadshade, Lemon Trillium, Wax Trillium
Trillium maculatum — Mottled Trillium, Spotted Trillium
Trillium persistens — Persistent Trillium, Edna's Trillium
Trillium pusillum + — Carolina Least Trillium, Virginia Dwarf Trillium
Trillium recurvatum — Prairie Trillium, Prairie Wake-robin
Trillium reliquum — Relict Trillium
Trillium rugelii — Southern Nodding Trillium
Trillium sessile — Sessile Trillium, Sessile Toadshade, Toad Trillium
Trillium simile — Sweet White Trillium, Confusing Trillium, Jeweled Trillium
Trillium stamineum — Twisted Trillium
Trillium sulcatum — Southern Red Trillium, Barksdale's Trillium
Trillium underwoodii — Underwood's Trillium
Trillium undulatum — Painted Trillium, Striped Wake-robin
Trillium vaseyi — Vasey's Trillium, Sweet Trillium, Sweet Beth
Triodanis perfoliata — Venus' Looking-glass
Triosteum angustifolium — Yellow-fruited Horse-gentian, Lesser Horse-gentian
Triosteum aurantiacum var. aurantiacum — Orange-fruited Horse-gentian
Triosteum perfoliatum — Perfoliate Horse-gentian, Perfoliate Tinker's-weed, Wild Coffee, Feverwort
Triphora trianthophora — Nodding Pogonia, Three Birds Orchid, Nodding Ettercap
Triplasis americana — Southern Sandgrass
Triplasis purpurea — Purple Sandgrass
Tripleurospermum perforatum — Scentless Chamomile, False Chamomile
Tripsacum dactyloides — Gama Grass, Eastern Gamagrass
Tristagma uniflorum — Spring Starflower, Spring Star, Star of Bethlehem
Triticum aestivum — Bread Wheat
Tsuga canadensis — Eastern Hemlock, Canada Hemlock
Tsuga caroliniana — Carolina Hemlock
Tussilago farfara — Coltsfoot
Typha angustifolia — Narrowleaf Cattail
Typha domingensis — Southern Cattail
Typha latifolia — Common Cattail
Typha Xglauca — Hybrid Cattail
Ulmus alata — Winged Elm
Ulmus americana — American Elm, White Elm
Ulmus americana — Florida Elm
Ulmus crassifolia — Cedar Elm
Ulmus glabra — Wych Elm, Scotch Elm
Ulmus parvifolia — Lacebark Elm, Chinese Elm
Ulmus procera — English Elm, English Cork Elm
Ulmus pumila — Siberian Elm, Dwarf Elm
Ulmus rubra — Slippery Elm, Red Elm
Ulmus serotina — September Elm, Rock Elm
Uniola paniculata — Sea Oats
Urochloa maxima — Guinea Grass
Urochloa ramosa — Browntop Millet, Dixie Signalgrass
Urtica chamaedryoides — Weak Nettle, Dwarf Stinging Nettle
Urtica dioica ssp. dioica — European Stinging Nettle, Great Nettle
Urtica dioica ssp. gracilis — American Stinging Nettle
Utricularia cornuta — Horned Bladderwort
Utricularia foliosa — Flatstem Bladderwort
Utricularia gibba — Shortspur Creeping Bladderwort
Utricularia gibba — Longspur Creeping Bladderwort
Utricularia inflata — Swollen Bladderwort, Inflated Bladderwort, Floating Bladderwort
Utricularia juncea — Southern Bladderwort, Slender Horned Bladderwort
Utricularia macrorhiza — Greater Bladderwort
Utricularia purpurea — Purple Bladderwort
Utricularia radiata — Small Swollen Bladderwort, Floating Bladderwort, little floating bladderwort
Utricularia resupinata — Northeastern Bladderwort, Resupinate Bladderwort, Lavender Bladderwort
Utricularia simulans — fringed bladderwort
Utricularia striata — Fibrous Bladderwort
Utricularia subulata — Slender Bladderwort, Zigzag Bladderwort
Uvularia grandiflora — Large-flowered Bellwort
Uvularia perfoliata — Perfoliate Bellwort
Uvularia puberula — Mountain Bellwort, Appalachian Bellwort, Carolina Bellwort, Coastal Bellwort
Uvularia sessilifolia — Wild-oats, Sessile-leaf Bellwort, Straw-lily
Vaccinium arboreum — Sparkleberry, Farkleberry
Vaccinium caesariense — New Jersey Highbush Blueberry
Vaccinium corymbosum — Smooth Highbush Blueberry
Vaccinium crassifolium ssp. crassifolium — Creeping Blueberry
Vaccinium crassifolium ssp. sempervirens — Rayner's Blueberry
Vaccinium darrowii — Darrow's Blueberry
Vaccinium elliottii — Mayberry, Elliott's Blueberry
Vaccinium erythrocarpum — Bearberry, Highbush Cranberry, Mountain Cranberry
Vaccinium formosum — Southern Highbush Blueberry, Swamp Highbush Blueberry
Vaccinium fuscatum — Hairy Highbush Blueberry, Black Highbush Blueberry
Vaccinium hirsutum — Woollyberry, Hairy Blueberry
Vaccinium macrocarpon — Cranberry, Large Cranberry
Vaccinium myrsinites — Southern Evergreen Blueberry
Vaccinium oxycoccos — Small Cranberry
Vaccinium pallidum — Dryland Blueberry, Lowbush Blueberry, Upland Low Blueberry, Hillside Blueberry
Vaccinium simulatum — Mountain Highbush Blueberry
Vaccinium stamineum — Southern Deerberry
Vaccinium stamineum — Dwarf Deerberry
Vaccinium stamineum — Florida Deerberry, Whiteleaf Deerberry
Vaccinium stamineum — Common Deerberry
Vaccinium stamineum — Appalachian Deerberry
Vaccinium tenellum — Southern Blueberry, Dwarf Blueberry, Small Cluster Blueberry, Narrowleaf Blueberry
Vaccinium virgatum — Rabbiteye Blueberry, Swamp Blueberry, Rabbitberry
Valerianella locusta — European Corn-salad
Valerianella radiata — Corn-salad, Beaked Corn-salad
Valerianella radiata — Corn-salad
Valerianella umbilicata — Navel Corn-salad
Vallisneria americana — Eelgrass, Water-celery, Tapegrass
Veratrum hybridum — Crisped Bunchflower, Broadleaf Bunchflower
Veratrum parviflorum — Mountain Bunchflower, Small-flowered Hellebore, Small False Hellebore
Veratrum virginicum — Virginia Bunchflower, Bog Bunchflower
Veratrum viride — White-hellebore, Indian Poke, False Hellebore, Cornhusk Lily
Veratrum woodii — Ozark Bunchflower, Wood's False-hellebore
Verbascum blattaria — Moth Mullein
Verbascum thapsus — Woolly Mullein, Common Mullein, Flannel-plant, Velvet-plant
Verbascum virgatum — Wand Mullein, Twiggy Mullein, Moth Mullein
Verbena bonariensis — Purpletop Vervain, Tall Vervain
Verbena bonariensis var. conglomerata — Purpletop Vervain, Tall Vervain
Verbena brasiliensis — Brazilian Vervain
Verbena hastata var. hastata — Blue Vervain, Common Vervain, Simpler's-joy
Verbena rigida — Stiff Verbena
Verbena simplex — Narrowleaf Vervain
Verbena stricta — Hoary Vervain
Verbena urticifolia var. urticifolia — White Vervain, Nettleleaf Verbena, Velvetleaf Vervain
Verbesina alternifolia — Common Wingstem
Verbesina occidentalis — Southern Crownbeard
Verbesina virginica var. laciniata — Southern Frostweed
Verbesina virginica var. virginica — White Crownbeard, Common Frostweed, White Wingstem, Virginia Wingstem
Verbesina walteri — Walter's Wingstem, Carolina Crownbeard, Walter's Crownbeard
Vernicia fordii — Tung-oil Tree
Vernonia acaulis — Stemless Ironweed, Carolina Ironweed
Vernonia angustifolia ssp. angustifolia — Narrowleaf Ironweed, Slender Ironweed
Vernonia flaccidifolia — Tennessee Ironweed
Vernonia gigantea ssp. gigantea — Tall Ironweed, Common Ironweed
Vernonia glauca — Broadleaf Ironweed, Appalachian Ironweed, Tawny Ironweed
Vernonia lettermannii — narrowleaf ironweed
Vernonia noveboracensis — New York Ironweed
Veronica americana — American Speedwell, American Brooklime
Veronica anagallis-aquatica — Water Speedwell, Brook Pimpernel
Veronica arvensis — Corn Speedwell, Wall Speedwell
Veronica beccabunga — European Speedwell, European Brooklime
Veronica chamaedrys — Germander Speedwell
Veronica hederifolia — Ivyleaf Speedwell
Veronica officinalis var. officinalis — Common Speedwell, Gypsyweed, Heath Speedwell
Veronica peregrina ssp. peregrina — Common Purslane Speedwell
Veronica persica — Bird's-eye Speedwell
Veronica scutellata — Marsh Speedwell, Narrowleaf Speedwell
Veronica serpyllifolia ssp. serpyllifolia — Thymeleaf Speedwell
Veronicastrum virginicum — Culver's Root
Viburnum acerifolium — Mapleleaf Viburnum, Maple-leaved Arrowwood, Dockmackie
Viburnum bracteatum — Limerock Arrowwood
Viburnum dentatum var. dentatum — Arrowwood
Viburnum dentatum var. dentatum — Carolina Arrowwood
Viburnum dentatum var. dentatum — Southern Arrowwood
Viburnum dilatatum — Linden Viburnum
Viburnum lantana — Wayfaring Tree
Viburnum lantanoides — Hobblebush, Moosewood, Witch Hobble, Tangle-legs
Viburnum lentago — Nannyberry, Sheepberry
Viburnum nudum var. cassinoides — Northern Wild Raisin, Withe-rod, Shonny Haw, Shawnee Haw
Viburnum nudum var. nudum — Southern Wild Raisin, Possumhaw Viburnum, Swamp Viburnum, Swamp-haw
Viburnum obovatum — Small-leaf Virburnum, Walter's Viburnum
Viburnum opulus var. americanum — Highbush-cranberry, Cranberry Tree, American Cranberry-bush
Viburnum opulus var. opulus — Guelder-rose, Snowball
Viburnum plicatum — Japanese Snowball, Doublefile Viburnum
Viburnum prunifolium — Blackhaw, Nannyberry
Viburnum rafinesquianum — Downy Arrowwood
Viburnum recognitum — Smooth Arrowwood, Southern Arrowwood
Viburnum rufidulum — Rusty Blackhaw, Blue Haw, Southern Black Haw, Rusty Haw
Viburnum sieboldii — Siebold's Viburnum
Vicia acutifolia — Sand Vetch, Fourleaf Vetch
Vicia americana ssp. americana — American Vetch, Purple Vetch, Tare
Vicia caroliniana — Carolina Vetch, Wood Vetch, Pale Vetch
Vicia cracca ssp. cracca — Cow Vetch, Tufted Vetch
Vicia grandiflora — Bigflower Vetch, Large Yellow Vetch
Vicia hirsuta — Tiny Vetch, Hairy Tare
Vicia lathyroides — Spring Vetch
Vicia sativa ssp. nigra — Narrowleaf Vetch
Vicia sativa ssp. sativa — Common Vetch
Vicia tetrasperma — Slender Vetch, Smooth Tare, Lentil Vetch, Four-seeded Vetch
Vicia villosa ssp. varia — Smooth Vetch, Winter Vetch
Vicia villosa ssp. villosa — Hairy Vetch, Fodder Vetch, Winter Vetch
Vinca major — Bigleaf Periwinkle, Greater Periwinkle
Vinca minor — Common Periwinkle
Viola affinis — Thinleaf Violet, LeConte's Violet, Missouri Violet, Sand Violet
Viola appalachiensis — Appalachian Violet, Henry's Violet
Viola arvensis — European Field Pansy
Viola bicolor — Johnny-jump-up, Wild Pansy, Field Pansy
Viola blanda var. blanda — Sweet White Violet
Viola blanda var. palustriformis — sweet white violet
Viola brittoniana var. brittoniana — northern coastal violet
Viola brittoniana var. pectinata — northern coastal violet
Viola canadensis var. canadensis — Canada Violet, Tall White Violet
Viola cucullata — Blue Marsh Violet, Bog Violet
Viola egglestonii — Cedar Glade Violet
Viola hastata — Halberd-leaf Violet, Spearleaf Violet, Halberd-leaved Yellow Violet, Silverleaf Violet
Viola hirsutula — Southern Wood Violet, Silvery Purple-leaf Violet
Viola labradorica — American Dog-violet
Viola lanceolata ssp. lanceolata — Lanceleaf Violet, Narrow-leaved Violet, White Bog Violet
Viola lanceolata ssp. vittata — Strapleaf Violet, White Bog Violet
Viola macloskeyi ssp. pallens — Wild White Violet, White Marsh Violet
Viola odorata — Sweet Violet, English Violet
Viola pedata — Birdsfoot Violet
Viola pedata — Sandhills Birdsfoot Violet
Viola pubescens var. pubescens — Hairy Yellow Forest Violet
Viola pubescens var. scabriuscula — Smooth Yellow Forest Violet
Viola rostrata — Long-spurred Violet
Viola rotundifolia — Round-leaf Yellow Violet, Early Yellow Violet
Viola sagittata var. ovata — Ovate-leaf Violet, Downy Violet
Viola sagittata var. sagittata — Arrow-leaved Violet, Arrowhead Violet
Viola septemloba — Cleft-leaved Violet
Viola septentrionalis — Northern Blue Violet
Viola sororia — Dooryard Violet, Confederate Violet, Common Blue Violet
Viola striata — Pale Violet, Creamy Violet
Viola tricolor — Johnny-jump-up
Viola triloba var. dilatata — Wood Violet, Wavy-leaved Violet
Viola triloba var. triloba — Early Blue Violet, Wood Violet, Palmate-leaved Violet
Viola tripartita — Three-parted Yellow Violet, Three-parted Violet
Viola tripartita — Three-parted Yellow Violet, Three-parted Violet
Viola villosa — Southern Woolly Violet
Viola walteri — Walter's Violet, Prostrate Blue Violet
Viola Xesculenta [septemloba X triloba] — Salad Violet
Viola Xprimulifolia [lanceolata X macloskeyi] — Primrose-leaf Violet
Vitex agnus-castus + — Chaste-tree
Vitex rotundifolia — Beach Vitex, Roundleaf Chaste-tree
Vitis aestivalis var. aestivalis — Summer Grape
Vitis aestivalis var. bicolor — Silverleaf Grape
Vitis cinerea var. baileyana — Possum Grape
Vitis cinerea var. cinerea — Graybark Grape, Pigeon Grape
Vitis cinerea var. floridana — Florida Grape
Vitis labrusca — Fox Grape
Vitis riparia — Riverbank Grape
Vitis rotundifolia var. munsoniana — Munson Grape, Bullace Grape
Vitis rotundifolia var. rotundifolia — Muscadine, Scuppernong
Vitis vulpina — Frost Grape, Winter Grape, Chicken Grape
Vulpia myuros — Rat-tail Fescue
Vulpia octoflora var. octoflora — Southern Six-weeks Fescue
Wahlenbergia marginata — Wahlenbergia, Asiatic bellflower
Waldsteinia fragarioides ssp. doniana — Southern Barren Stawberry
Waldsteinia fragarioides ssp. fragarioides — Northern Barren Strawberry
Waldsteinia lobata — Piedmont Barren Strawberry, Lobed Barren Strawberry
Waltheria indica — Sleepy Morning
Warea cuneifolia — Carolina Warea, Carolina Pineland-cress
Wisteria floribunda — Japanese Wisteria
Wisteria frutescens — American Wisteria, Swamp Wisteria, Atlantic Wisteria
Wisteria sinensis — Chinese Wisteria
Wisteria Xformosa [floribunda X sinensis] — Hybrid Asian Wisteria
Wolffia columbiana — Colombian Watermeal
Wolffiella gladiata — Bog-mat, Mud-midgets
Woodsia appalachiana — Appalachian Woodsia, Appalachian Cliff Fern, Mountain Woodsia
Woodsia ilvensis — Rusty Cliff Fern, Rusty Woodsia
Woodsia obtusa ssp. obtusa — Blunt-lobed Cliff Fern, Common Woodsia
Woodwardia areolata — Netted Chain Fern, Net-veined Chain Fern
Woodwardia virginica — Virginia Chain Fern
Xanthium spinosum — Spiny Cocklebur
Xanthium strumarium var. glabratum — Cocklebur
Xanthorhiza simplicissima — Yellowroot
Xanthosoma sagittifolium — Arrowleaf Elephant Ear, Malanga
Xerophyllum asphodeloides — Turkeybeard, Beargrass, Mountain-asphodel
Ximenia americana — Tallow Wood, Hog Plum
Xyris ambigua — Bog Yellow-eyed Grass
Xyris baldwiniana — Grassleaf Yellow-eyed Grass, Baldwin's Yellow-eyed Grass
Xyris brevifolia — Shortleaf Yellow-eyed Grass
Xyris caroliniana — Pineland Yellow-eyed Grass, Carolina Yellow-eyed Grass
Xyris difformis var. curtissii — Curtiss's Yellow-eyed Grass
Xyris difformis var. difformis — bog yellow-eyed grass
Xyris difformis var. floridana — Florida Yellow-eyed Grass
Xyris elliottii — Elliott's Yellow-eyed Grass
Xyris fimbriata — Giant Yellow-eyed Grass
Xyris jupicai — Yellow-eyed Grass
Xyris scabrifolia — Roughleaf Yellow-eyed Grass, Scabrous-leaved Xyris, Harper's Yellow-eyed Grass
Xyris scabrifolia — Chapman's Yellow-eyed Grass
Xyris serotina — acid swamp yellow-eyed grass
Xyris stricta — pineland yellow-eyed grass
Xyris torta — Slender Yellow-eyed Grass, Mountain Yellow-eyed Grass
Youngia japonica — Asiatic Hawksbeard, Youngia, Japanese Crepis, Oriental Hawksbeard
Yucca aloifolia — Spanish Dagger
Yucca filamentosa — Beargrass, Spoonleaf Yucca, Curlyleaf Yucca, Adam's Needle
Yucca flaccida — Weakleaf Yucca, Adam's Needle
Yucca gloriosa — Mound-lily Yucca, Spanish Bayonet
Zamia pumila ssp. pumila — Florida Coontie
Zanthoxylum americanum — Prickly-ash, Toothache Tree, Northern Prickly-ash
Zanthoxylum clava-herculis — Toothache Tree, Hercules-club, Sea-ash, Southern Prickly-ash
Zanthoxylum fagara — Wild Lime, Lime Prickly-ash, Colima, Una de Gato
Zelkova serrata — Japanese Zelkova
Zenobia pulverulenta — Zenobia, Honeycups
Zephyranthes atamasca var. atamasca — Common Atamasco Lily, Rain-lily, Easter Lily, Naked Lily
Zephyranthes atamasca var. treatiae — Rain-lily, Treat's Zephyr-lily
Zephyranthes candida — Fall Rain-lily
Zephyranthes simpsonii — Florida Atamasco Lily, Red-margined Atamasco Lily
Zigadenus densus — Crow-poison, Savanna Camass
Zigadenus elegans ssp. glaucus — White Death-camas, White Camass
Zigadenus glaberrimus — Large Death Camas, Snakeroot, Sandbog Death Camus, Bog Death Camas
Zigadenus leimanthoides — Pinebarrens Death Camas
Zizania aquatica var. aquatica — Southern Wild-rice, Indian Rice
Zizaniopsis miliacea — Southern Wild-rice, Water-millet, Giant Cutgrass
Zizia aptera — Heartleaf Golden Alexanders, Heartleaf Alexanders
Zizia aurea — Common Golden Alexanders
Zizia trifoliata — Mountain Golden-Alexanders
Zornia bracteata — Zornia, Viperina