Helianthus schweinitzii Torrey & A. Gray. Schweinitz's Sunflower. Phen: Late Aug-Oct. Hab: Clayey soils of woodlands and roadsides, in areas formerly with post oak-blackjack oak savannas, xeric oak-pine woodlands, or "Piedmont prairies", now primarily on mowed road or powerline rights-of-way. Dist: Piedmont of nw. NC and nc. SC, primarily within 100 km of Charlotte, NC
Origin/Endemic status: Endemic
Other Comments: Some earlier reports (as in Heiser et al. 1969) of occurrences in se. NC, e. SC, and c. SC are based on misidentifications. See Matthews, Barden, & Matthews (1997) and Grubbs & Wynes (2015) for informative discussions about this species.
Synonymy: = FNA21, K1, K3, K4, RAB, S, SE1
Heliophily: 9
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