Petiole 6--18 cm, glabrous; leaf blade ovate, 4--16 × 5--15 cm, 3-sect, papery to subleathery, abaxially glabrous, adaxially sparsely puberulous to nearly glabrous on veins, base cordate; lateral segments slightly shorter than central one, obliquely ovate, unequally 2-parted; central segment petiolulate, deltoid-ovate, 3--12 cm, pinnately divided; segments 4--6 pairs, ± contiguous to each other, margin acute serrate, apex acute. Scapes 1 or 2, slightly longer than leaves, glabrous. Inflorescences 4--8-flowered; bracts linear-lanceolate, 3-parted or pinnately divided. Sepals 5, greenish yellow, narrowly ovate, 8--12.5 × 2--2.5 mm, glabrous. Petals lanceolate, 3--6 mm, glabrous, apex ± attenuate. Stamens ca. 1/2 as long as petals. Pistils 9--12. Follicles 6--7 mm, stipe 7--8 mm. Fl. Mar--Apr, fr. Apr--Jun.
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