Trans. Hort. Soc. London 7: 277, plate 9A. 1828.
Stems not branching, straight, 2–4 dm, proximal internodes elongate; bulblets rare. Leaves: basal usually persistent, 1–3 dm × 10–25 mm; blade flat, tapering toward both ends, becoming involute; cauline ca. halfway up stem. Inflorescences subumbellate, 1–4-flowered; bracts 2 or more, narrowly lanceolate to linear, long-attenuate, unequal, 2–10 cm. Flowers erect; perianth open, campanulate; sepals ovate to lanceolate, shorter than petals, glabrous, apex acuminate; petals lavender, with deep purple adaxial crescent distal to gland, obovate, cuneate, ± ciliate laterally, sparingly covered with long, flexuous hairs distal to gland; glands ± triangular-lunate, slightly depressed, bordered proximally by narrow, deeply fringed membrane, covered with short, thick hairs, hairs and membrane fringe densely covered with long papillae; filaments longer than anthers; anthers oblong, 6–10 mm, apex obtuse. Capsules erect, 3-winged, ellipsoid to nearly globular. Seeds light beige. 2n = 40.
Phenology: Flowering summer.
Habitat: Low meadows along creeks
Elevation: 700–900 m
Idaho, Oreg., Wash.