Leaves lunate in cross section. Scape 0.5-7 cm. Flowers 16-25 mm; perianth tube 6-9 mm, lobes 10-16 mm; anthers 3-4 mm; ovary 7-9 mm; style 4-5 mm; pedicel 3-15 cm. 2n = 12, 36. Flowering spring (Apr--Jun). Coastal prairies, foothill woodlands; 0--400 m; Calif., Oreg.