Radical leaves: stipules ovate, both surfaces pilose or margin ciliate, margin entire or 1-or 2-serrate; petiole 1–3 cm, sparsely villous, base decurrent, membranous; leaf blade interrupted pinnate, 5–10 cm, with 9–20 pairs of leaflets; rachis sulcate, villous; leaflets sessile, proximal ones ovate or oblong, 1–3 × 0.5–1 mm, base oblique, margin entire or obtusely crenate, ciliate; distal leaflets broadly ovate to suborbicular, 0.5–1.5 cm × 3–8 mm, base oblique, margin sharply serrate, yellow cilliate, apex rounded or acute; cauline leaves 1–4, broadly linear, 3-lobed or pinnately lobed, 1–1.5 cm. Flowering stems erect, branched distally, 4–20 cm tall, pubescent; inflorescence cymose, (1 or)2–4-flowered; bracts ovate-lanceolate, 3–4 mm, long ciliate. Flowers 1.5–2.5 cm in diam.; pedicel 1–2.5 cm, densely pubescent. Hypanthium campanulate, ca. 2 mm, together with sepals abaxially densely pubescent and villous. Sepals triangular-ovate, 3–4 mm, apex acute; epicalyx segments oblong, ca. 2 mm, villous and ciliate, apex rounded. Petals yellow, obovate or obcordate, 5–7 mm, glabrous, apex emarginate. Stamens 40–60; filaments persistent, shorter than petals, glabrous, base dilated. Carpels many; ovary cylindric, glabrous; style filiform, glabrous. Achenes black-brown, long globose, ca. 2 mm, glabrous. Fl. Jun–Jul, fr. Aug–Oct.
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