Herbs perennial. Roots much branched, slender; rootlets usually fibrous. Flowering stems prostrate or ascending, 20–60 cm, pilose. Radical leaves: stipules lanceolate, margin entire; petiole 8–15 cm, villous; leaflets 3, abaxially grayish green, adaxially green, rhombic-ovate or rhombic-elliptic, 3–5 × 2–3.5 cm, both surfaces sparsely pubescent, rarely sericeous, base strongly obliquely cuneate, margin coarsely dentate with 7–11 pairs of teeth, apex acute; cauline leaves 1 or 2; stipules ovate, herbaceous, margin entire or 2-or 3-lobed; petiole 2–4 cm, densely villous; leaflets similar to radical ones but smaller, 1.5–3.6 × 1–1.5 cm. Inflorescence cymose, 2–4-flowered. Flowers 1–1.4 cm in diam.; pedicel slender, 0.6–6 cm, pubescent. Sepals broadly ovate, ca. 6 × 3 mm, abaxially villous, apex acute; epicalyx segments lanceolate, slightly longer than sepals, abaxially villous, apex acute. Petals yellow, suborbicular, ca. 3 mm, apex emarginate. Ovary lanate at base; style subterminal, thin at base, thickened distally. Fl. Apr-Jun.
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