Plant: Annual, slender, minutely strigose; stem prostrate or weakly ascending, 4-45 cm Leaves: generally compound, alternate, stipuled, 1.5-6.5 cm, odd-1-pinnate;; leaflets 5-13, 2-10 mm, at least upper elliptic, acute at tips, lower sometimes blunt, notched at tip INFLORESCENCE: raceme, axillary; flowers 1-4, 4-7 mm Flowers: bilateral; calyx 5-lobed; corolla whitish, faintly lilac-tinged (rarely purplish); banner outside wings in bud, keel blades with small protrusion at base locking into pit on adjacent wing; 9 filaments fused, 1 free; ovary (and fruit) generally sessile, style slender, stigma minute Fruit: legume, 10-20 mm, 2-3 mm wide, linear in side view, gently curved near base, ± straight toward tip, ± 3-sided (laterals ± convex, bottom grooved), maturing dark brown or blackish, glabrous or minutely strigose; chambers ± 2; Seeds 2-many, smooth, compressed, ± notched at attachment scar Misc: Gravelly or sandy areas; 0-1950 m. References: Shreve and Wiggins, 1964.J.C. Hickman, ed. The Jepson Manual.