Bushy shrub to 2 m, with stiff, slender, green, 5- angled branches; lvs small, mostly 3-foliolate, or the upper 1-foliolate, the petiole 2-8 mm, the lfls obovate, 5-10 mm; fls 20-25 mm, solitary or paired in the upper axils, forming long terminal racemes; pods 3-5 cm, villous along the sutures; 2n=46. Native of Europe, well established in dry sandy soil as an escape from cult., from N.S. to Va., and on the Pacific coast. May, June.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.