Erythronium grandiflorum Pursh

Bulbs slender, 30–50 mm. Leaves 5–20 cm; blade green, lanceolate, ± glaucous, base gradually narrowed to petiole, margins ± wavy. Scape 5–30 cm. Inflorescences usually 1-flowered, sometimes up to 5-flowered. Flowers: tepals recurved, bright yellow with (in live specimens) narrow paler zone at base, or white to creamy white with yellow base, narrowly ovate, 20–35 mm, length at least 4 times width, inner usually auriculate at base; stamens 11–18 mm; filaments white, ± slender, linear, less than 0.8 mm wide; anthers cream, yellow, red, or purplish red; pollen yellow or red; style white, 10–15 mm; stigma unlobed or with slender, recurved lobes (1–)2–4 mm. Capsules oblong to narrowly obovoid, 2–5 cm. 2n = 24.

Sagebrush, open woodland and grassy mountain slopes, sometimes to the tree line. Rich moist soil along the banks of streams, shaded woods and sub-alpine meadows, often in large patches.

The bulbs are steamed, roasted or boiled. They can be dried and stored. The flower petals are eaten raw in salads.

Plants can be grown by seeds or by division of the root. Bulbs can be planted. The bulbs are planted 8-10 cm deep and 10 cm apart.