Herbs perennial. Roots fibrous, subequally thick. Stems 5.5--8.5 cm, glabrous below, sparsely puberulent above, simple, rarely branched at base. Basal leaves ca. 3; petiole 2--2.6 cm, glabrous; blade cordate-pentagonal, 5--7 × 6--10 mm, papery, base cordate, apex rounded. Stem leaves 2 or 3, sessile, 3-sect, segments 2-cleft or undivided, ultimate lobes linear-lanceolate or linear-oblong. Flowers solitary, terminal, 1.5--1.9 cm in diam. Pedicel 1--5 cm, appressed puberulent. Receptacle glabrous. Sepals 5, broadly ovate or orbicular-ovate, 3.5--4 mm, abaxially pilose. Petals 5(or 6), flabellate or broadly obovate, 6--7.5 × 6--9.5 mm, nectary pit without a scale, apex rounded. Stamens numerous; anthers oblong. Carpels numerous, glabrous; style slightly shorter than ovary. Fl. Jul.
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