Herbs. Roots conic, fleshy. Stems branched proximally, yellow, 30--35 cm, soft, glabrous or subglabrous. Petiole 1--3 mm; leaf blade saccate, 1--1.5 cm × 5--8 mm, both surfaces glabrous or sparsely pubescent, apex acute. Cymes conic, many flowered; bracts lanceolate or ovate, 3--5 × 1--3 mm, margin ciliate, apex acute. Pedicel linear, 1--2.5 cm, densely glandular hairy. Sepals 5, lanceolate, 4--5 mm, sparsely pubescent abaxially, base broadened, margin membranous, ciliate, apex acuminate. Petals 5, white, saccate, 1.5--2 × as long as sepals, apex toothed. Stamens shorter than sepals; anthers yellow-green. Ovary ovoid. Styles 2, linear, equaling sepals. Fl. Jul--Aug.

* Forests; ca. 2800 m. SW Sichuan.