Stems erect, 10-20 cm, many branched, ca. 1 mm in diam., puberulent along 1 side. Leaves opposite, linear-spatulate, 5-20 × 1-2 mm, glabrous, base cuneate, apex rounded; lateral veins obscure. Inflorescences extra-axillary or terminal, umbel-like, 3-7-flowered; peduncle slender, 3-8 cm, puberulent. Pedicel 4-7 mm. Sepals ovate-triangular, ca. 1 × 0.5 mm, glabrous; basal glands 5. Corolla greenish yellow, rotate; tube ca. 1 mm, glabrous; lobes oblong-lanceolate, ca. 4 × 1 mm, glabrous outside, densely pubescent inside. Corona deeply 5-lobed; lobes semiorbicular, ca. 0.5 × 0.5 mm, erect, somewhat fleshy, apex rounded, nearly half as long as anther appendages. Anthers oblong, appendage rounded, as long as stigma head; pollinia oblong-ovoid. Stigma head disclike, apex slightly elevated. Fl. May-summer.

* Among bare rocks along river banks; 700-900 m. Yunnan.