An annual plant, 5 to 16 inches high with erect or decumbent, branching and somewhat pubescent stems. Leaves evenly pinnate, sensitive to the touch, bearing a small gland near the base of the petiole; leaflets twelve to forty, linear-oblong, blunt and mucronate at the apex, rounded and oblique at the base, inequilateral, one-fourth to two-thirds of an inch long, about one-fourth as wide. Flowers two or three together in the axils, one-fourth of an inch broad or less; calyx lobes five, pointed; corolla yellow, somewhat irregular, three of the five petals smaller than the others; stamens five, all perfect. Fruit a small, linear, pubescent or smooth pod, 1 to 1 ½ inches long.
In dry and sandy soil, Maine to Georgia, west to Indiana, Kansas and Texas. Flowering from July to September.
Memoir 15 N. Y. State Museum
A. Sensitive Pea; Wild Sensitive Plant - Chamaecrista nictitans