Herbs perennial. Roots fibrous, subequally thick. Stems 1.5--3.7 cm, glabrous or puberulent, simple. Basal leaves 2 or 3; petiole 0.7--2 cm, glabrous, rarely sparsely pubescent; blade 3-sect, pentagonal, 0.3--0.7 × 0.5--1.1 cm, leathery, glabrous or sparsely pubescent, base deeply cordate, central segment rhombic, broadly rhombic, or obovate, 3-cleft nearly to middle, with narrowly ovate or oblong entire lobes, or long elliptic or narrowly obovate, undivided; lateral segments oblique flabellate or oblique obovate, unequally 2-lobed; lobes undivided or unequally 2-lobed, ultimate lobules narrowly ovate or lanceolate. Stem leaves 1 or 2, short petiolate or sessile, palmately 3--7-sect, segments linear. Flowers solitary, terminal, 1--1.5 cm in diam. Pedicel 1--2 cm. Receptacle glabrous. Sepals 5, dark purple or greenish, elliptic-ovate, 4--6 mm, abaxially glabrous or yellowish puberulent. Petals 5, broadly obovate, 5.5--7 × 4--6.5 mm, nectary pit without a scale, apex emarginate or rounded-truncate. Stamens numerous; anthers oblong. Carpels numerous, glabrous; style shorter than ovary.
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