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FOC | Family List | FOC Vol. 9 | Rosaceae | Sibbaldia

3. Sibbaldia tetrandra Bunge, Verz. Altai Pfl. 17. 1836.

四蕊山莓草 si rui shan mei cao

Dryadanthe bungeana Ledebour; D. tetrandra (Bunge) Juzepczuk; Potentilla tetrandra (Bunge) J. D. Hooker.

Herbs perennial, low, tufted. Rhizome robust, terete. Flowering stems 2–5 cm tall. Radical leaves 0.5–15 cm including petiole; stipules brown, dilated, membranous, abaxially pilose; petiole white pilose; leaf blade 3-foliolate; leaflets green on both surfaces, obovate-oblong, 5–8 × 3–4 mm, both surfaces white pilose, base cuneate, apex truncate and 3-dentate. Flowers 1(–3), usually unisexual, 4–8 mm in diam. Sepals 4, triangular-ovate, apex rounded or acute; epicalyx segments lanceolate or ovate, minute, nearly equaling sepals, apex acute to acuminate. Petals 4, pale yellow, obovate-oblong, nearly equaling or slightly longer than sepals. Stamens 4, inserted away from broad, 4-fid disk. Style lateral. Achenes glabrous. Fl. and fr. May–Aug.

Forests, meadows on mountain slopes, rock crevices; 3000--5400 m. Qinghai, Xinjiang, Xizang [Mongolia, Nepal, Pakistan, Russia (W Siberia), Sikkim; C Asia].


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