Desmodium laevigatum (Nutt.) Dc.

Stem erect, 5–12 dm, glabrous or nearly so below the much-branched infl; stipules lance-subulate, 5–8 mm; lfls thin, ovate, glabrous, glaucous beneath, the terminal one 4–8 cm, half to three-fourths as wide; fls 8–10 mm, deep rose or purple, on pedicels 10–20 mm; cal 3.5–5 mm; stipe 3.5–6.5 mm; articles 2–5, 4.5–8 mm, glabrous or nearly so on the upper suture, the lower suture abruptly curved near the middle. Dry upland woods; s. N. Y. to Ind. and Mo., s. to Fla. and Tex. July, Aug.