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Canada Violet,
Viola canadensis
Calyx glabrous/sparsely hirtellous; auricles short, not elongating in fruit, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Walter's Violet,
Viola walteri
Calyx glabrous, eciliate; auricles short and entire, not elongating in fruit, per Violets (Violaceae) of the Great Plains and Eastern North America (Ballard).
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Colombian Waxweed,
Cuphea carthagenensis
Floral tube green, glabrous inside; stamens much shorter than floral tube, per Weakley's Flora (2012).
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Common Water-primrose,
Ludwigia hexapetala
Stems sparsely to densely villous (rarely glabrous), per Weakley's Flora (2015).
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Creeping Seedbox,
Ludwigia repens
Sepals persistent, triangular to ovate, glabrous, acute to acuminate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Devil's Walkingstick,
Aralia spinosa
Leaves glabrous or glabrate [here note the widely spaced trichomes], per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Whorled Marsh-pennywort,
Hydrocotyle tribotrys
Fruit strongly flattened laterally, glabrous, 1-2mm long; pedicels 1-10mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Hairy-jointed Meadow-parsnip,
Thaspium barbinode
Fruit winged, 3-4mm long, glabrous; mericarps slightly flattened dorsally, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Honewort,
Cryptotaenia canadensis
Fruit two attached seedlike mericarps, linear-oblong, 4-7mm long, glabrous, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Parsnip,
Pastinaca sativa
Fruit broadly ellipsoid, glabrous, strongly flattened dorsally, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Water Tupelo,
Nyssa aquatica
Acuminate lvs, 1-2" petioles, & glabrous twig distinguish it from N. ogeche, per Native Trees of the Southeast, An Identification Guide (Kirkman, Brown, & Leopold, 2007).
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Southern Swamp Dogwood,
Swida foemina
Leaves glabrous beneath or with a few short, straight, appressed trichomes, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Plumleaf Azalea,
Rhododendron prunifolium
Flower tubes are glabrous, or nearly so, which aids in identification, per American Azaleas (Towe, 2004).
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Swamp Azalea,
Rhododendron serrulatum
Corolla tube glabrous within; pistil usually noticeably longer than stamens, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Swamp Azalea,
Rhododendron serrulatum
Leaves glabrous below, except for strigose bristles along midrib & major veins, per Weakley's Flora.
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Sand-myrtle,
Kalmia buxifolia
Leaves stipitate-glandular or glabrous, entire or with a few obscure teeth, per Weakley's Flora.
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Northern Sheepkill,
Kalmia angustifolia
Leaves whorled in 3s (rarely opposite), 2-5cm long, glabrous beneath, per Weakley's Flora (2015).
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Northern Maleberry,
Lyonia ligustrina var. ligustrina
Leaves pubescent on both surfaces (or rarely glabrous), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Dangleberry,
Gaylussacia frondosa
Young twigs glabrous, per Weakley's Flora.
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Dangleberry,
Gaylussacia frondosa
Leaves glabrous or pubescent beneath, often glaucous, per Weakley's Flora.
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Black Huckleberry,
Gaylussacia baccata
Sepals 0.7-1mm, glabrous, sessile-glandular, per Flora of North America.
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Bear Huckleberry,
Gaylussacia ursina
Sepals 0.5mm, glabrous, sparsely sessile-glandular, per Flora of North America.
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Mayberry,
Vaccinium elliottii
Twigs slender, green, zigzag, hairy or glabrous, per Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004).
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Hillside Blueberry,
Vaccinium pallidum
Calyx and corolla glabrous, often glaucous. Calyx lobes acute, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Bearberry,
Vaccinium erythrocarpum
Leaves finely serrate, glabrous, long-pointed. Fruit borne on long stalks, per Woody Plants of the Blue Ridge (Lance).
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Bearberry,
Arctostaphylos uva-ursi
Leaves scattered along the stem, glabrous, 1-3cm long, tapered to the base, per Field Guide to Acadia National Park (Butcher, 2005).
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Fraser's Loosestrife,
Lysimachia fraseri
Capsules 3-5mm, not punctate, glabrous, per Flora of North America.
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Swamp Candles,
Lysimachia terrestris
Leaves glabrous & tapered to both ends, margins revolute (often only slightly), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Chaffweed,
Centunculus minimus
Glabrous, 0.3-1.5dm tall, freely branched near decumbent base. Lvs 3-7mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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American Storax,
Styrax americanus var. americanus
Calyces of var. americanus are essentially glabrous, per Weakley's Flora (2022).
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White Ash,
Fraxinus americana
Twigs, petioles, petiolules, and rachises glabrous, per Weakley's Flora (2015).
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Green Ash,
Fraxinus pennsylvanica
Leaves with 7 or 9 leaflets, glabrous, green on both sides, per Woody Plants of the Blue Ridge (Lance).
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Common Lilac,
Syringa vulgaris
Leaves ovate or broad-ovate, entire, dark almost bluish-green, glabrous, per Manual of Woody Landscape Plants (Dirr, 1975+).
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American Columbo,
Frasera caroliniensis
Glabrous, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Stiff Bluestar,
Amsonia rigida
Stem & leaves glabrous; lvs elliptic, lower & upper mostly 3-5x long as wide, per Weakley's Flora (2015).
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Indian-hemp,
Apocynum cannabinum
Leaves glabrous to tomentose beneath, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Poke Milkweed,
Asclepias exaltata
Stem simple, solitary, 5-10dm tall, glabrous or sparsely puberulent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Longleaf Milkweed,
Asclepias longifolia
Leaves numerous, linear, glabrous (to sparsely pubescent along veins beneath), per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Narrowleaf Dawnflower,
Stylisma angustifolia
Similar to S. patens and occurring in the same habitats, but calyx glabrous, per Wildflowers of the Sandhills Region (Sorrie, 2011).
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Manroot,
Ipomoea pandurata
Peduncles 1-5 flowered; pedicel glabrous, stout, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Manroot,
Ipomoea pandurata
Calyx lobes coriaceous, oblong-elliptic, glabrous, strongly imbricate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Eastern Blue Phlox,
Phlox divaricata var. divaricata
Sepals acuminate to very slightly awned, the awn 0-0.5mm long; corolla tube glabrous, per Weakley's Flora (2022).
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Western Blue Phlox,
Phlox divaricata var. laphamii
Sepals acuminate to very slightly awned, the awn 0-0.5mm long; corolla tube glabrous, per Weakley's Flora (2022).
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Broadleaf Phlox,
Phlox amplifolia
Broad open inflorescence w glandular hairy bracts and glabrous corolla tube, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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American Beautyberry,
Callicarpa americana
Leaves 7-23cm long, stellate-scurfy below (vs. C. dichotoma ~ glabrous below), per Weakley's Flora.
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Chinese Beautyberry,
Callicarpa dichotoma
Similar in appearance to the native, but leaves are nearly glabrous below, per Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004).
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Broadtooth Hedgenettle,
Stachys latidens
Stems mostly glabrous, but with short reflexed hairs on the angles, per Wildflowers of the Southern Mountains (Smith, 1998).
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Basil Bergamot,
Monarda clinopodia
Orifice of the calyx glabrous to slightly hirsute with a few long hairs, per Weakley's Flora.
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Short-toothed Mountain-mint,
Pycnanthemum muticum var. 1
Stems clearly hairy to the naked eye (vs. those of var. muticum appearing glabrous to naked eye), per Weakley's Flora (2022).
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Appalachian Mountain-mint,
Pycnanthemum montanum
Bracts of the inflorescence glabrous (or very sparsely pubescent) on the upper surface, per Weakley's Flora (2023).
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Loomis's Mountain-mint,
Pycnanthemum loomisii
Mericarps with a smooth surface, glabrous or a few short hairs at the tip, per Weakley's Flora (2020).
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Carolina Horsenettle,
Solanum carolinense var. carolinense
Style greenish, glabrous, to 1.5cm long. Stigma dark green, per www.missouriplants.com (Tenaglia).
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Jerusalem-cherry,
Solanum pseudocapsicum
Foliage glabrous, glabrescent or very sparsely pubescent (w appressed hairs), per Weakley's Flora.
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Creeping Mazus,
Mazus miquelii
Plant glabrous: leaves obovate, 1-3cm long, 5-15mm wide, distally serrate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Moth Mullein,
Verbascum blattaria
Cauline leaves glabrous, crenulate to dentate-serrate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Wand Mullein,
Verbascum virgatum
Leaves may be hairy or may not [vs. leaves of V. blattaria glabrous], per www.CalFlora.net.
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Downy Beardtongue,
Penstemon australis
Cauline leaves glabrous to pubescent, moderately thick, narrowly lanceolate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Foxglove Beardtongue,
Penstemon digitalis
Leaves glabrous, subcoriaeceous, denticulate to subentire, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Eastern Figwort,
Scrophularia marilandica
Stems slightly hairy or glabrous, often 4-angled and furrowed, per www.illinoiswildflowers.info.
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Oldfield Toadflax,
Linaria canadensis
Pedicels erect, 1.8-5.5mm in fruit, sparsely glandular-pubescent, sometimes glabrous, per Flora of North America.