Southeastern Sneezeweed

Perennials, 30–80 cm. Stems usually 1, usually unbranched distally, weakly winged, glabrous or sparsely to moderately hairy proximally, sparsely to moderately hairy distally. Leaves usually glabrous, rarely sparsely hairy; basal blades obovate to oblanceolate, usually pinnatifid, sometimes undulate to undulate-serrate, rarely entire; proximal and mid blades linear-oblanceolate to lance-linear, entire or undulate-serrate; distal blades lance-linear, entire. Heads 1(–3) per plant, usually borne singly. Peduncles 3–20 cm, moderately to densely hairy. Involucres hemispheric, 12–20 × 15–30 mm. Phyllaries moderately hairy. Ray florets 13–34, neuter; corollas yellow, 15–22 × 5–8 mm. Disc florets 250–650(–800+); corollas yellow proximally, yellow to yellow-brown distally, 4–5.5 mm, lobes 5. Cypselae 1.2–1.4 mm, moderately hairy; pappi of 8–11 entire or slightly lacerate, non-aristate scales 1.2–1.5 mm. 2n = 32, 34.

Leptopoda pinnatifida Schweinitz ex Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 372. 1841