Herbs perennial, dwarf, 3–8 cm tall. Stems prostrate, rooting at nodes, slender, pubescent when young, glabrescent; flowering branchlets erect, pubescent. Leaves compound, 5-foliolate, rarely 3-foliolate; petiole 1–3 cm, pubescent, petiolule of leaflets 2–4 mm; stipules free, broadly elliptic or suborbicular, 3–4 mm, margin entire, apex obtuse; blade of leaflets suborbicular, 3–8(–12) × 4–10 mm, both surfaces glabrous or puberulous, base cuneate, margin deeply divided nearly to midvein, with 3 distinct lobes; lobes sharply divided again, deeply sharply serrate, apex obtuse. Inflorescences usually 1-flowered. Pedicel 6–12 mm, pubescent. Flowers 1.5–2 cm in diam. Calyx abaxially pubescent; sepals broadly ovate, rarely narrower, 4–5 × 2–3 mm, apex abruptly acuminate, with blackish tip. Petals white, broadly elliptic, 6–7 × 4–6 mm, margin entire or undulate, rarely lobed, apex obtuse or subtruncate. Stamens 30, in 2 whorls, outer sepals ca. 2 mm, inner sepals shorter; filaments broad, flat; anthers small. Pistils ca. 24; ovary glabrous; styles ca. 2 mm, slender; stigma truncate. Fruit unknown. Fl. Jun–Jul.
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