Cal campanulate or obconic, the elongate teeth subequal; pet clawed; standard obovate, not auriculate, its claw generally with thickened, infolded margins; keel-pet usually beaked; stamens 10, diadelphous; some of or all the filaments dilated at the tip; ovary sessile; pod several-seeded, dehiscent, oblong to linear, terete (in our spp.), flattened, or 4- angled; herbaceous or suffrutescent plants with pinnately compound, 1-5-foliolate lvs and solitary or umbellate fls. (Acmispon, Hosackia) 100, mainly N. Temp.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.