Plants annual. Stems diffuse, slender, rarely rooting at lower nodes, pilose or hirsute, Stipules 0.5--1.5 mm, slender, scarious. Leaf blade ovate or reniform, 0.5--1(--1.5) cm, pilose or glabrous. Peduncle 1--5 cm. Pedicel 0.2--2 cm, pilose. Sepals ovate-elliptic, ca. 3 × 1 mm, glabrous or pilose, margin membranous, apex acute. Petals white, subequaling sepals, 2-parted. Stamens 5, shorter than sepals, 2--3.5 mm. Ovary ovoid; styles 3, connate to below middle. Capsule ovoid, 2--3 mm. Seed reniform, tuberculate.

This plant is much more delicate than the more common, following species.

Grasslands between forests; 1700--1900 m. S Xizang [native to Central and South America].