五叶山莓草 wu ye shan mei cao

Sibbaldia purpurea Royle var. pentaphylla (J. Krause) Dikshit.

Herbs perennial, woody based. Rhizome robust. Flowering stems low, tufted, 2–5 cm tall. Radical leaves 1–1.5 cm including petiole; stipules abaxially brown, membranous, sparsely pilose or subglabrous; petiole sericeous; leaf blade palmately 5-foliolate; leaflets green on both surfaces, obovate or obovate-oblong, 3–8 × 2–5 mm, 2 lateral leaflets much smaller than 3 central ones, both surfaces densely white villous or sericeous-villous, base cuneate, apex truncate or obtuse and 2- or 3-serrate. Inflorescence axillary, 1–3-flowered. Flowers ca. 4 mm in diam., unisexual. Sepals 4 or 5, triangular-ovate, apex acute; epicalyx segments lanceolate, slightly shorter than sepals, abaxially pilose, apex acute. Petals yellowish white, obovate-oblong, apex obtuse. Stamens 4 or 5, inserted away from broad, 4- or 5-fid disk. Style lateral. Achenes glabrous. Fl. and fr. Jun–Aug.

Alpine meadows, rock crevices; 3700--4500 m. Qinghai, Sichuan, Xizang, Yunnan.