Herbs perennial. Roots fibrous, subequally thick. Stems 0.6--5 cm, sparsely puberulent, sometimes glabrous, simple. Basal leaves 3--5; petiole 0.4--2.2 cm, glabrous; blade 3-partite or 3-sect, pentagonal, 1.8--5 × 3--7 mm, papery, glabrous, base cordate or truncate, central segment rhombic or obovate, undivided; lateral segments obliquely flabellate or obliquely obovate, unequally 2-lobed. Stem leaves 1 or absent, short petiolate or sessile, 2-or 3-cleft, or undivided, lobes linear or lanceolate. Flowers solitary, terminal, 0.6--0.8 cm in diam. Receptacle glabrous. Sepals 5, elliptic, 2.5--3 mm, glabrous. Petals 5, long elliptic, 4--5.2 × 2 mm, nectary pit without a scale, apex obtuse. Stamens 3--7; anthers oblong. Carpels numerous, glabrous; style slightly longer than ovary. Fl. Jul--Aug.
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