Bulbs sometimes clustered, ovoid, 1.5–3 cm diam. Leaves 4–7, 2–6 dm × 5–12 mm. Inflorescences 15–40 cm; sterile bracts 0, bracts subtending flowers shorter than or equaling pedicel. Flowers actinomorphic; tepals connivent over capsules after anthesis, deciduous as capsules develop, deep bluish violet, each 3- or 5-veined, 10–20 × 3–5 mm; anthers yellow, 2.5–3.5 mm; fruiting pedicel spreading, 15–25 mm. Capsules deciduous, shiny green, subglobose, 5–10 mm. Seeds 2–5 per locule. 2n = 30.
Phenology: Flowering late spring.
Habitat: Wet meadows
Elevation: 200–400 m
Of conservation concern.
Camassia howellii flowers one to two weeks later than sympatric populations of C. leichtlinii.