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.

Flowering late spring. Wet meadows; of conservation concern; 200--400 m; Oreg.

Camassia howellii flowers one to two weeks later than sympatric populations of C. leichtlinii.