Including synonyms: A. vancouverense Macoun.; A. watsoni Howell; A. cascadense Peck. Plant alpine or subalpine, found in wet meadows. Plants blooming in late spring, or early summer. Plants has onion odor. Plants bulbiferous. Bulbs ovoid, or oblong. Bulbs gray. Peduncles inflated. Peduncle height 0.5–0.8 dm tall. Peduncles with leaves. Main axis of peduncle exceeded by leaves. Leaves alternate. Total number of leaves 2. Leaves falcate. Leaves 1–1.5 dm long. Leaves 3–6 mm wide. Leaves basal. Leaves withering after flowering. Inflorescence axis straight. Inflorescence umbellate. Inflorescences dense. Inflorescences bracted. Flower many. Pedicel length 6–12 mm long. Flowers funnel-form. Flower pink, or red, or rose, or purple. Perianth free at base. Perianth 6 parted, all petal-like. Perianth length 60–120 cm long. Perianth parts Sepals and petals similar (tepals). Perianth segments do no twist together & wither as a unit after flowering. Petals lanceolate. Stamens are included. Fertile stamens 6. Anthers yellow, or purple. Filaments free. Styles fused. Styles fused at middle or above. Styles 1. Fruits capsules. Capsules crested at top.
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