青海虎耳草 qing hai hu er cao

Antiphylla nana (Engler) Losinskaja; A. octandra (Harry Smith) Losinskaja; Saxifraga octandra Harry Smith; S. qinghaiensis J. T. Pan.

Plants many branched, 1-1.5 cm tall, with numerous, crowded shoots forming cushions. Flowering stem scapose, 5-6 mm, glandular pubescent. Rosette leaves imbricate, subspatulate-oblong, 3-4 × 0.9-1 mm, leathery, glabrous, chalk gland 1, obscure, vein 1, apex ± reflexed, thickened. Flower solitary. Sepals erect, then spreading to reflexed, subelliptic to ovate, 1.4-1.5 × ca. 1 mm, subleathery, glabrous, veins 3, confluent into a verruca at apex, apex obtuse. Petals (if present) white, elliptic, ca. 2.5 × 1.4 mm, 3-veined, base contracted into a claw ca. 0.4 mm, apex obtuse. Stamens ca. 2.8 mm. Ovary subsuperior, ovoid, ca. 1.2 mm; styles erect, ca. 0.7 mm. Fl. Jul-Aug.

* Lake shores, alpine rock crevices; 4200-4900 m. Gansu, S Qinghai (Maqên Xian, Yushu Xian), W Sichuan (Daocheng Xian).