Herbs annual. Roots fibrous, subequally thick. Stems slender, 1.5--2.5 cm, glabrous. Basal leaves ca. 6; petiole 6--15 mm, glabrous; blade 3-lobed, flabellate-obovate or rhombic-obovate, 1.5--3 × 1.8--2.8 mm, papery, glabrous, base broadly cuneate or rounded, lobes deltoid or broadly ovate, obtuse at apex. Stem leaves 1 or 2, similar to basal ones, with shorter petiole. Flowers solitary, leaf-opposed, ca. 0.3 cm in diam. Pedicel 3--6 mm, glabrous. Receptacle glabrous. Sepals 5, elliptic, ca. 1.2 mm, glabrous. Petals 5, narrowly obovate or elliptic, ca. 1.5 × 0.6--0.9 mm, nectary pit without a scale, apex rounded. Stamens ca. 4, 1--1.2 mm; anthers elliptic. Carpels 9--14; ovary 0.5--0.8 mm, glabrous; style ca. 0.2 mm. Fl. Jul.
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