Proc. Amer. Acad. Arts 14: 268. 1879.
Plants usually bulbose; bulb coat membranous. Stems usually branching distally, ± flexuous, 2–6 dm. Leaves: basal withering, 1–3 dm; blade linear. Inflorescences 1–few-flowered; bracts opposite pedicel, 2–10 cm. Flowers erect; perianth open, broadly campanulate; sepals with purple blotch near base, lanceolate, 2–3 cm, apex acuminate; petals white tinged with lilac, with purple blotch near base, usually obovate, ± concave, 2–5 cm, glabrous except few hairs near base, apex obtuse; glands oblong, not depressed, densely hairy, hairs branching; filaments 8–10 mm; anthers lilac, oblong, 4–5 mm. Capsules erect, narrow-oblong, rounded in cross section, 2–5 cm, apex obtuse. Seeds light yellow, translucent, flat. 2n = 14.
Phenology: Flowering spring–early summer.
Habitat: Heavy soil, open grassy slopes, openings in brush
Elevation: less than 700 m
Calochortus catalinae is increasingly threatened by habitat loss.