Vines woody. Branches longitudinally 5-or 6-grooved, densely puberulous. Leaves 2-pinnate or pinnate, 5--21-foliolate; petiole 2--6.5 cm, densely puberulous; leaflet blades narrowly ovate, narrowly elliptic, ovate, or oblong, 1.8--8.5 × 1--4.2 cm, papery to subleathery, unequally 2-lobed, abaxially densely appressed puberulous, adaxially sparsely puberulous, base rounded to obtuse, margin entire or rarely 1-dentate, apex acute to acuminate; basal veins abaxially ± prominent. Cymes axillary or terminal, 8-to many flowered; peduncle 2.5--6.5 cm, sometimes nearly absent; bracts short petiolate or sessile, ovate to linear, 3--14 mm. Flowers 1--1.2 cm in diam. Pedicel 0.8--1.8 cm, densely puberulous. Sepals 4, white, spreading, oblong to obovate-oblong, 5--8 × 1.8--3 mm, abaxially velutinous, adaxially densely appressed puberulous, apex obtuse. Stamens 3.8--6 mm, glabrous; anthers narrowly oblong to oblong, 1.5--2.2 mm, apex obtuse. Ovaries pubescent. Style ca. 5 mm, densely villous. Achenes narrowly lanceolate to fusiform, 4--4.5 × 1--1.2 mm, pubescent; persistent style 2.5--4 cm, plumose. Fl. Dec--Jan, fr. Feb--Apr.
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