Perennial herbs, roots with stalked or sessile tubers. Leaves radical, erect, linear to Ianceolate, flat, often withering early; leaf fibers from previous seasons often present. Inflorescence racemose or paniculate; flowers usually 1-·6 per node, chocolate- or vanilla-scented; pedicels erect to nodding, articulate close to flower. Tepals free, rotate to reflexed, not spirally twisted after flowering, bluish to purple to white; outer tepals narrow, 3-5-veined; inner tepals elliptic to circular. Stamens 6; filaments glabrous; anthers linear, longer than filaments, ± latrorse, dehiscing by longitudinal slits, with 2 or 4 densely hairy basal appendages. Ovules 1-6 per loculus; style simple. Fruit a capsule, sometimes enclosed in persistent perianth; seeds globose to angular, black.