Plant: perennial, glabrous to very glandular-hairy Leaves: odd-1-pinnate; stipules deciduous; leaflets gland-dotted, 9-19, lanceolate to narrowly ovate INFLORESCENCE: raceme, spike-like, axillary, dense Flowers: calyx lobes unequal, < or ± = tube; corolla 9-14 mm, yellowish or greenish-white; 9 filaments fused, 0 or 1 free Fruit: legume, 12-15 mm, indehiscent, ellipsoid, prickly or rarely glabrous; Seeds 1-several, often ± reniform, generally hard, smooth Misc: Moist, generally open, disturbed sites, such as creekbanks, roadsides; < 2400 m.; May-Jul