Bulb solitary or clustered, subcylindric; tunic grayish brown to blackish brown, reticulate. Leaves 2(or 3), subopposite; petiole 1--12 cm; leaf blade lanceolate- to ovate-oblong, (6--)8--15 × (2--)3--7 cm, main veins green or white, base deeply cordate to rounded, apex shortly caudate or acuminate. Scape 30--60 cm, terete, covered with leaf sheaths only at base. Spathe 2-valved, persistent or deciduous. Umbel globose, densely many flowered. Pedicels subequal, 1.5--4 × as long as perianth, elongate in fruit, ebracteolate. Perianth white, rarely pale red; outer segments narrowly ovate to ovate or ovate-oblong, 3.5--5 × 1.4--2 mm, apex retuse or obtuse, sometimes denticulate; inner ones lanceolate-oblong to narrowly oblong, (3.5--)4--6 × 1--1.6 mm, apex retuse, obtuse, or acuminate, sometimes irregularly denticulate at least at distal margin. Filaments equal, 1--1.5 × as long as perianth segments, connate at base and adnate to perianth segments; outer ones subulate; inner ones narrowly triangular, 0.8--1.1 mm wide at base. Ovary constricted at base into a stipe ca. 0.5 mm; ovules 1 per locule. Fl. and fr. Jul--Sep.

* Forests, forest margins, thickets, damp places, stream banks, rock crevices; 1500--4000 m. SE Gansu, NE Guizhou, W Hubei, E Qinghai, S Shaanxi, Sichuan, NW Yunnan.