Plant: perennial, rhizomed; spines stipular; taproot often swollen; stem 2-6 dm

Leaves: odd-1-pinnate; leaflets 13-21, elliptic or obovate; stipules spiny or 0

INFLORESCENCE: raceme, spike-like, terminal, often glandular-hairy

Flowers: calyx 11-15 mm, tube cylindric, generally darkly glandular-puberulent, sometimes bulged on 1 side near base, lobes < or > tube, upper pair fused 1/2 or more; corolla generally 15-20(25) mm, pink or white; 9 filaments fused, 1 free; style tip finely hairy around stigma, hairs often hidden by pollen

Fruit: legume, 4-6 cm, glabrous, dehiscent, oblong, ± flat but plump, leathery; base stalk-like; Seeds 1-several, often ± reniform, generally hard, smooth

Misc: Sandy alluvial fans; 800 m.