Herbs perennial. Roots fibrous, subequally thick. Stems 18--25 cm, glabrous below, sparsely puberulent above, branched. Basal leaves ca. 7; petiole 5--7 cm, glabrous; blade ternate, pentagonal in outline, 1.2--2.2 × 2.2--2.6 cm, papery, glabrous, base truncate-cordate; central leaflet broadly rhombic, 0.8--1.5 × 1--1.4 cm, 3-partite; central lobe broadly oblanceolate or long elliptic, entire; lateral lobes obliquely cuneate, unequally 2-lobulate, petiolule 4--6 mm; lateral leaflets oblique flabellate, 2 × unequally 2-partite, ultimate lobules narrowly ovate, petiolules 1--2.5 mm. Lowermost stem leaf similar to basal leaves but short petiolate; upper leaves 3-sect, segments narrowly linear. Flowers solitary, terminal, ca. 1.5 cm in diam. Receptacle glabrous. Sepals 5, elliptic-ovate, ca. 5 mm, abaxially appressed puberulent. Petals 5, obovate, 6--7 × 4.5--6 mm, nectary pit without a scale, apex rounded. Stamens 5, 2.5--3 mm; anthers oblong, 1.2 mm. Carpels numerous. Achene 1--1.5 mm overall, glabrous; style 0.4--0.6 mm. Fl. Jul.
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