Rhizome branched, prostrate, long, ca. 2 mm in diam. Leaves 1 or 2; petiole 4--7 cm, strigose distally, base sheathing; leaf blade 3-sect, reniform or reniform-pentagonal, 4--5 × 7--9 cm, strigose, base deeply cordate, margin sparsely and irregularly obtusely dentate; segments sessile; central segment 3-lobed, rhombic-obovate, ca. 4 mm wide; lateral segments unequally 2-parted, obliquely flabellate. Scape 8--15(--20) cm, sparsely strigose distally; cyme 1-flowered. Involucral bracts 3, sessile; bract blade unequally 2- or 3-lobed, flabellate-obovate or obovate, 2--4 cm; lobes lobulate. Pedicel 3--5(--10) cm, sparsely strigose. Sepals 5, white, obovate, 12--15 × 7--9 mm, abaxially sparsely puberulent, basal veins 3--5, vein anastomoses 1--3. Stamens 3.5--5 mm; filament subfiliform; anther ellipsoid, ca.1 mm, apex rounded. Pistils ca. 8; ovary densely puberulent; style subulate-terete, short. Fl. Apr.

* Scrub by rivers; ca. 1800 m. C Sichuan (Dujiang Yan Shi, Tianquan Xian).