Annual; stems erect, 1-5 dm, glabrous to villous; petiolar gland saucer-shaped, short-stalked; lfls 7-20 pairs, oblong, 6-15 mm, aristate, usually glabrous; fls solitary or 2-3 together, on pedicels 2-4 mm; pet very unequal, one 6-8 mm and nearly or fully twice as long as the others; stamens 5, unequal, filaments very short; anthers 1.5-3 mm; pods oblong, straight, flat, 2-4 cm נ3-6 mm; 2n=16. Dry, especially sandy soil, upland woods, dunes, and disturbed habitats; Mass. and s. Vt. to N.Y., O., Mo., and Kans., s. to tropical Amer. July-Sept. (C. procumbens; Cassia n.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.