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Elliott's Aster,
Symphyotrichum elliottii
Leaves smooth, sessile with a tapering, non-clasping base, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).
New York Aster,
Symphyotrichum novi-belgii var. elodes
Stem leaves long, slender, sessile, auriculate to very-slightly clasping.
Eastern Silvery Aster,
Symphyotrichum concolor var. concolor
Leaves sessile and broad-based but not strongly clasping, per Wildflowers of Tennessee (Carman, 2005).
Frost Aster,
Symphyotrichum pilosum var. pilosum
Leaves of lower stem sessile or tapered to a short petiole, hairy. — Ron Lance
Small White Oldfield Aster,
Symphyotrichum racemosum var. subdumosum
Cauline lvs acute, tapering to sessile/sometimes clasping base, entire or sparsely serrate, per The Illustrated Flora of Illinois: Asteraceae, Part 1 (Mohlenbrock, 2015).
Bluestem Goldenrod,
Solidago caesia
Flowers in nearly sessile clusters in upper axils. Stem arching, glaucous, per Wildflowers of the Southern Mountains (Smith, 1998).
Appalachian Goldenrod,
Solidago flaccidifolia
Leaves average 2.5-3× long as wide, cuneate to a sessile base, per Weakley's Flora (2022).
Curtis's Goldenrod,
Solidago curtisii
Leaves toothed, sessile, lanceolate to lanceolate-elliptical, tapering, per All About South Carolina Wildflowers (Midgley, 1999).
Roan Mountain Goldenrod,
Solidago roanensis
Upper leaves sessile, lanceolate, surpassing lower portion of inflorescence, per Wildflowers of the Southern Mountains (Smith, 1998).
Slender Goldenrod,
Solidago erecta
Mid & distal cauline leaves sessile, blades linear-elliptic, margins entire, per Flora of North America.
Narrowleaf Showy Goldenrod,
Solidago rigidiuscula
Stem leaves firm, 20+, narrowly oblong, acute, tapered to sessile base, entire, <2.5cm wide, per The Illustrated Flora of Illinois: Asteraceae, Part 1 (Mohlenbrock, 2015).
Gorge Goldenrod,
Solidago faucibus
Mid to distal cauline subsessile to sessile, progressively reduced distally, per Flora of North America.
Heartleaf Goldenrod,
Solidago sphacelata
Leaves ovate, acute to acuminate, serrate, long-petiolate or the upper sessile, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Licorice Goldenrod,
Solidago odora
Leaves are dark green, lance-shaped, sessile, to 4" long. — Patrick McMillan
Southeastern Stiff Goldenrod,
Solidago jacksonii
Stem leaves sessile, oval, very stiff, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Camphorweed,
Heterotheca subaxillaris
Upper leaves sessile, base rounded to clasping, per Weakley's Flora (2020).
Starry Rosinweed,
Silphium dentatum
Lvs petiolate or sessile/lanceolate, falcate or ovate/bases attenuate to round, per Flora of North America.
Common Wild Quinine,
Parthenium integrifolium var. integrifolium
Upper leaves smaller than lower, often sessile, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Glade Wild Quinine,
Parthenium auriculatum
Stem leaves all auriculate-clasping: upper sessile, lower w winged petioles expanded at the base, per Weakley's Flora (2023).
Pineland Squarehead,
Tetragonotheca helianthoides
Upper stem leaves sessile, the lower on short winged stalks; margins toothed, per Wildflowers of the Sandhills Region (Sorrie, 2011).
Woodland Black-eyed Susan,
Rudbeckia hirta var. hirta
Cauline lvs lanceolate, ovate or pandurate, and petiolate or sometimes sessile, per Flora of North America.
Narrowleaf Sunflower,
Helianthus angustifolius
Leaves narrow, sessile, w rough surfaces & revolute (curled under) margins, per Atlantic Coastal Plain Wildflowers (Nelson, 2006).
Schweinitz's Sunflower,
Helianthus schweinitzii
Leaves scabrous above, tomentose beneath, short-petiolate to sessile, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Downy Sunflower,
Helianthus mollis
Leaves sessile and cordate, mostly or all opposite, per Weakley's Flora (2015).
Woodland Sunflower,
Helianthus divaricatus
Opposite, virtually sessile leaves with abruptly rounded bases, per Wildflowers of the Southern Mountains (Smith, 1998).
Woodland Sunflower,
Helianthus divaricatus
Leaves sessile, the 2 lateral veins diverging from midrib at very base of leaf, per Weakley's Flora.
Smith's Sunflower,
Helianthus smithii
Leaves resin-dotted below, subsessile, linear-lanceolate, w only 1 main vein, per Weakley's Flora (2020).
Showy Bur-marigold,
Bidens laevis
Opposite, sessile, undivided 2-6" leaves distinguish it from other Bidens, per Atlantic Coastal Plain Wildflowers (Nelson, 2006).
Nodding Bur-marigold,
Bidens cernua
Leaves sessile and sometimes connate at the base, usually toothed, per Wildflowers of the Southern Mountains (Smith, 1998).
Nodding Bur-marigold,
Bidens cernua
Lvs sessile, lance-linear to lance-ovate, coarsely serrate to almost entire, per Wildflowers of Tennessee (Carman, 2005).
Littleleaf Sneezeweed,
Helenium brevifolium
Stem leaves sessile with long, often very narrow, decurrent bases, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Purplehead Sneezeweed,
Helenium flexuosum
Stem leaves reduced upward, sessile, bases decurrent in wings on the stem, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).