Tuberous geophyte to 40 cm. Leaves sometimes dry at flowering, bipinnatisect, to 25 cm long with segments 1-3 mm wide. Flowers to 50 on branching peduncles, ± 25 mm diam., white, yellow, or pink, 3 lower petals forming a keel; hypanthium 12-55 mm long, much longer than pedicel.