Erect perennial, 1–2 m, glabrous or sparsely villous above; stipules lance-linear; petiolar gland short-cylindric or rounded or dome-shaped; lfls commonly 4–8 pairs, oblong or elliptic, 2–5 cm, acute or obtuse, mucronate; infl of several axillary racemes, less floriferous than no. 1 [Senna hebecarpa (Fernald) H. S. Irwin & Barneby]; buds nodding; sep unequal; pet 10–15 mm, slightly dissimilar; ovary appressed-hairy; pods glabrous or with scattered minute incurved hairs, tardily dehiscent, 6–10 cm × 8–11 mm, the joints about twice as wide as long; seeds nearly twice as long as wide, plump, with depressed center; 2n=28. Moist open woods and streambanks; s. N.Y. to s. Wis. and e. Neb., s. to Fla. and Tex. July, Aug. (Cassia m.; C. medsgeri; Ditremexa medsgeri)
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