Leaves 20–40 cm × 5–15 mm. Scape 10–80 cm, smooth. Flowers: perianth white, often flushed violet or lilac abaxially, 15–28 mm, tube broadly funnelform-campanulate, acute at base, 7–11 mm, lobes 10–16 mm; stamens attached alternately at 2 levels, unequal, those of proximal row shorter; filaments nearly linear, slightly wider at base, 1–1.5 or 2–3 mm, apical appendages absent; anthers white, 2–4 mm; ovary bright yellow in flower, equal to stipe; pedicel 2–10(–18) cm. 2n = 14, 28.
Low fields, wet grasslands, vernal streams and pools, closed cone pine forests, mixed evergreens, foothill woodlands, often on serpentine soils; at elevations from sea level to 800 metres.