Rhizome ca. 1 cm thick. Leaves 6--10, suberect or arching, abaxially glaucous, 15--40 cm × 4--12 mm, glabrous, midvein conspicuous, apex acuminate. Scape 30--35 cm, usually shorter than leaves. Raceme 4.5--7 cm, 9--14-flowered; bracts green, lanceolate-linear to linear, larger one 0.7--1.3 cm, smaller one 3.5--6 mm. Pedicel 0.8--1.5 cm, usually very narrowly winged. Perianth white, campanulate; tepals oblong-ovate, 5--8 × 3--4 mm, 1-veined, apex obtuse. Filaments 1.5--2 mm; anthers subcordate, 2--2.5 mm. Ovary ca. 2.5 mm. Style ca. 5 mm. Fl. May--Jun. 2 n = 40*.

Thickets, shady rocky slopes; 2300--2600 m. S Xizang, W Yunnan [Bhutan, India, Nepal, Sikkim].