Stems 1-several, ±erect, 2-7 dm, unbranched or with a few weak axillary branches; herbage densely villous or sericeous to sparsely strigillose or partly glabrous; lfls mostly (9-)15-25(-31), elliptic or linear-oblong, 1-3 cm; racemes terminal to the main stem and sometimes to axillary branches, short-pedunculate or sessile, compact, mostly 4-8 cm; pedicels 4-10(-17) mm; bracts setaceous, deciduous; fls 1.5-2 cm, usually bicolored, the standard yellow to ochroleucous, the wings and keel pink or pale purple; fr 3.5-5.5 cm, strigose to villous; 2n=22. Old fields, open woods, and dunes, often in sandy soil; s. N.H. to Fla., w. to Wis., se. Minn., Kans., and Tex. June, July (Cracca v.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.