Erythronium tuolumnense Applegate

Bulbs ovoid, 50–100 mm, readily forming sessile offsets. Leaves 15–35 cm; blade green, elliptic to ovate, margins entire to ± wavy. Scape ± reddish, 15–35 cm. Inflorescences usually 1–4-flowered. Flowers: tepals yellow, narrowly ovate, 20–35 mm, inner with small auricles at base; stamens 12–16 mm; filaments white to creamy white, slightly widened, 0.4–0.6 mm wide at base; anthers yellow; style ± white, 8–10 mm; stigma ± unlobed or with lobes shorter than 1 mm. Capsules obovoid, 2–4 cm.

A very rare plant in the wild, growing in chaparral, yellow pine forests and woodlands in the foothills at elevations of 300-600 metres

It is grown from bulbs. The bulb clumps are divided.