Plant glabrous. Rhizome blackish brown, (1--)2--3 cm, to 6 mm in diam. Stem (15--)20--36 cm. Leaves few, basal, 5-foliolate; petiole 5--11 cm; leaf pentagonal, 3--9 × 3--7.5 cm; lateral leaflets obliquely ovate, unequal in size, lower leaflets 0.4--2 × 0.4--1.9 mm, upper leaflets obliquely ovate, 1.1--3.5 × 0.9--3 cm; central leaflet rhombic to broadly rhombic-ovate, 1.8--6 × 1.5--5 cm, base cuneate, margin distally crenate, apex obtuse. Stem leaves 2(--4), petiole 2--5 cm, leaf blade similar to basal leaves. Inflorescences 7--19 cm, (1--)3--7-flowered; bracts simple or 3-sect; lower bracts foliaceous, upper bracts sessile, ca. 3 mm. Flowers 1--1.7 cm in diam., glabrous. Pedicel 2.5--3.5 cm. Sepals white, obovate-elliptic, 5--9 × 3--5.5 mm, apex obtuse. Petal limbs broadly obovate, ca. 4 mm, apex retuse or entire; claw longer than limb. Stamens ca. 20, 5--6 mm; anthers broadly ellipsoid, ca. 0.6 mm. Follicles obovoid-lanceolate, 1.1--1.5 cm; persistent styles ca. 2 mm. Seeds 8 or 9, yellowish brown, subglobose, ca. 1 mm in diam., smooth. Fl. Apr--May, fr. Apr--Jun.
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