对生叶虎耳草 dui sheng ye hu er cao

Plants many branched, cespitose, with crowded shoots forming cushions. Shoot leaves opposite; leaf blade ovate, ca. 3 × 2 mm, rather thick, glabrous, chalk gland 1, apex subacute. Flower solitary, sessile. Sepals erect, broadly ovate, ca. 2 × 2 mm, abaxially and marginally glandular pilose, chalk gland 1, veins 3, confluent at apex, apex subobtuse, glabrous. Petals white, obovate, ca. 5 × 3 mm, 3-5-veined, base contracted into a claw, apex obtuse. Stamens longer than sepals. Ovary ovoid; styles rather long. Fl. Jul-Aug.

Rock crevices on cliffs; 3600-4100 m. SW Sichuan (Muli Zang Zu Zizhixian), SE Xizang, NW Yunnan (Zhongdian Xian) [Bhutan, Nepal, Sikkim].