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Construction of these comparisons is ongoing....
COMPARE Aaron's Rod and Golden-banner
COMPARE Adder's Mouth and Adder's Tongue
COMPARE Alumroot, Foamflower, and Miterwort
COMPARE Anglepod and Spinypod (Climbing Milkweed)
COMPARE armpits of Cinnamon and Interrupted Fern
COMPARE Arrowhead, Arum, Elephant's Ear and Pickerelweed
COMPARE asters with heart-shaped leaves
COMPARE Baby Blue Eyes and Buttercup Phacelia
COMPARE bark of American Hornbeam and Tag Alder
COMPARE Beggar's Lice (Tick-trefoil) species
COMPARE bipinnately compound leaves of forbs
COMPARE bipinnately or tripinnately compound leaves of shrubs
COMPARE bipinnately or tripinnately compound leaves of trees
COMPARE bipinnately or tripinnately compound leaves of vines
COMPARE Canada Sanicle and Pale Avens
COMPARE Cherokee Rose and McCartney Rose
COMPARE Chervil, Corydalis, and Fumitory
COMPARE Clasping Mullein, Moth Mullein, Wand Mullein, and Woolly Mullein
COMPARE Cohosh, Doll's-eyes, and Goatsbeard
COMPARE compound leaves of woodland herbs, with toothed margins
COMPARE compound leaves of vines
COMPARE cones of Fir, Hemlock and Spruce
COMPARE conifers (not including Pines)
COMPARE Crossvine, Trumpet Creeper and Yellow Jessamine
COMPARE Crow-poison and Fly-poison
COMPARE Dame's Rocket and Fireweed
COMPARE Dandelions and Dandelion-like species
COMPARE Elf-orpine and Puck's Orpine
COMPARE Fairywand and Lizard's Tail
COMPARE False Garlic and Star-of-Bethlehem
COMPARE False Nettle, Wood Nettle and Stinging Nettle
COMPARE False-foxglove species
COMPARE Flowering Spurge and False Flowering Spurge
COMPARE flowers of Bellwort species
COMPARE flowers of Buckeye species
COMPARE flowers of Cinquefoil and Strawberry species
COMPARE flowers of Dicentra species
COMPARE flowers of Horsebalm species
COMPARE flowers of Jewelweed species
COMPARE flowers of Lady Lupine and Sky-blue Lupine
COMPARE flowers of Maple species
COMPARE flowers of Pale and White Avens
COMPARE flowers of pink-flowering Locust species
COMPARE flowers of Sassafras and Spicebush
COMPARE flowers of white-flowering Trilliums
COMPARE flowers of Wisteria species
COMPARE foliage of Danthonia species
COMPARE Fragrant Sumac and Poison Oak
COMPARE fronds of Netted Chain Fern and Sensitive Fern
COMPARE fruit of Catalpa species
COMPARE fruit of Elaeagnus species
COMPARE fruit of Elderberry species
COMPARE fruit of Galium, Geum and Sanicula species
COMPARE fruit of Indiangrass species
COMPARE fruit of Lauraceae family
COMPARE fruit of Plumegrass species
COMPARE fruits that are an aggregate of achenes
COMPARE fruits that are an aggregate of berries
COMPARE fruits that are an aggregate of follicles
COMPARE Grass-leaved Golden-asters
COMPARE grass-like leaves of woodland or meadow flowering herbs
COMPARE Hop-hornbeam and Hornbeam
COMPARE Indian Pipes, Pinesap and Pygmy Pipes
COMPARE involucral bracts of Bidens and Coreopsis
COMPARE involucral bracts of Black-eyed Susan and Cutleaf Coneflower
COMPARE involucral bracts of Centaurea
COMPARE involucral bracts of DYCs
COMPARE involucral bracts of DYCs with ray and disc flowers
COMPARE involucral bracts of DYCs with ray flowers only (no disc)
COMPARE involucral bracts of North American asters
COMPARE involucral bracts of Rattlesnake-root
COMPARE involucral bracts of Silphium
COMPARE involucral bracts of Sunflowers
COMPARE involucral bracts of Thistles
COMPARE involucral bracts of Wild Carrot/Queen Anne's Lace species
COMPARE involucral bracts of Wild Lettuce
COMPARE Juniperleaf (Polypremum) and Pearlwort (Sagina)
COMPARE Large and Small Whorled Pogonia and Indian Cucumber-root
COMPARE leaf scars of Ash species
COMPARE leaf scars of Sumac and Tree-of-heaven
COMPARE leaf undersides of Kalmia and Rhododendron species
COMPARE leaflets of Mimosa-like leaves
COMPARE leaves of American Lovage, Hairy Angelica and Water Hemlock
COMPARE leaves of Bellwort species
Compare leaves of Big-leaved Aster and Schreber's Aster
COMPARE leaves of Black, Chalk, Florida, Norway and Sugar Maple
COMPARE leaves of Black, Northern Red, Scarlet and Shumard Oaks
COMPARE leaves of Blackgum and Persimmon
COMPARE leaves of Blue Curls species
COMPARE leaves of Carolina Rose and Swamp Rose
COMPARE leaves of Cherrybark Oak and Southern Red Oak
COMPARE leaves of Chestnut and Sawtooth Oak
COMPARE leaves of Chestnut Oaks and Chinquapin Oaks
COMPARE leaves of Clematis species
COMPARE leaves of Clethra and Itea
COMPARE leaves of Dicentra species
COMPARE leaves of Dwarf Iris and Dwarf Crested Iris
COMPARE leaves of Elaeagnus species
COMPARE leaves of Fernleaf Phacelia and Virginia Waterleaf
COMPARE leaves of Fragaria and Potentilla
COMPARE leaves of Galax and Oconee Bells
COMPARE leaves of Geranium, Larkspur and Monkshood
COMPARE leaves of Giant Ragweed and Sassafras
Compare leaves of Gillenia species
COMPARE leaves of Goodyera species
COMPARE leaves of grape-like species
COMPARE leaves of Grass-of-Parnassus species
COMPARE leaves of Hazel Alder, Hazelnut, Witch Hazel and Witch-alder
COMPARE leaves of Hairy Sunflower and Woodland Sunflower
COMPARE leaves of Hydrangea species
COMPARE leaves of Indian Cucumberroot, Starry Campion, Whorled Coreopsis and Loosestrife
COMPARE leaves of Joe Pye Weed species
COMPARE leaves of Kalmia and Rhododendron species
COMPARE leaves of Locust species
COMPARE leaves of Magnolia species
COMPARE leaves of Mapleleaf Viburnum and Maple species
COMPARE leaves of Mountain Maple and Striped Maple
COMPARE leaves of Mugwort, Ragweed and Spanish Needles
COMPARE leaves of Mulberry species
COMPARE leaves of Peppervine, Trumpet-creeper and Wisteria
COMPARE leaves of Pin Oak, Scarlet Oak, Shumard Oak and Texas Oak
COMPARE leaves of Poison Ivy and others confused with it
COMPARE leaves of Silverbell, Spicebush and Storax
COMPARE leaves of Snakeroot species
COMPARE leaves of Spring Beauty species
COMPARE leaves of Sumac and Tree-of-heaven
COMPARE leaves of Taxodium species
COMPARE leaves that resemble Thalictrum
COMPARE leaves of Toothwort species
COMPARE leaves that are trifoliolate and palmately compound
COMPARE leaves that are trifoliolate and pinnately compound
COMPARE loments of Desmodium species
COMPARE Mousetail and Plantain
COMPARE needles of Fir, Hemlock and Spruce
COMPARE ocreae of Jumpseed and Smartweed species
COMPARE Palm and Palmetto species
COMPARE palmately veined leaves of vines
COMPARE pedicels of Gerardia species
COMPARE Pencil-flower and Viperina
COMPARE petal shape in yellow-flowering Trilliums
COMPARE petiolar glands of Chamaecrista
COMPARE pinnae of Cinnamon and Interrupted Fern
COMPARE pinnately compound leaves of forbs
COMPARE pinnately compound leaves of shrubs
COMPARE pinnately compound leaves of trees
COMPARE Rue-anemone and False Rue-anemone
COMPARE samaras of Ash species
COMPARE seedheads of Bottlebrush Grass, Cereal Rye, Little Barley, and Virginia Wild-rye
COMPARE seedheads of Sporobolus species
COMPARE sepals and bracts of Bindweed and Morning Glory
COMPARE sepals and bracts of Cinquefoil and Strawberry species
COMPARE Silky Dogwood and Southern Swamp Dogwood
COMPARE Solomon's Plume, Solomon's Seal, Twisted Stalk, and two Bellworts
COMPARE stamen color in yellow-flowering Trilliums
COMPARE stems of Joe Pye Weed species
COMPARE stems of Rhexia species
Type only the first 2-3 letters to choose from a dropdown list of genera (this can be especially helpful when you're not sure of the spelling).
If "wooly" doesn't deliver the results you want, try an alternate spelling such as "woolly" or just "wool".