Vines woody. Branches shallowly 5-or 6-grooved, densely puberulous. Leaves pinnate, (3--)5-foliolate; petiole 3--8 cm, densely puberulous; leaflet blades elliptic-ovate to elliptic-oblong, rarely obliquely rhombic, 7--13 × 3--6 cm, papery, abaxially densely puberulous, adaxially sparsely strigose, base broadly cuneate to rounded, margin entire, apex acuminate to acute; basal veins abaxially prominent. Cymes axillary or terminal, 9--60-flowered; peduncle 4--12 cm; bracts linear, 6--9 mm. Flowers ca. 1.7 cm in diam. Pedicel 0.9--2 cm, densely puberulous. Sepals 4, white, spreading, obovate-oblong to oblanceolate, 7--9 × 2--4 mm, abaxially velutinous, adaxially glabrous, margin abaxially velutinous, apex obtuse. Stamens 6.2--8 mm, glabrous; anthers narrowly oblong, 1.3--1.5 mm, apex obtuse. Ovaries puberulous. Style ca. 5 mm, densely villous. Achenes elliptic-ovate, 2.2--3 × ca. 2 mm, pubescent; persistent style 4.5--6.5 cm, plumose. Fl. Jul--Sep, fr. Oct--Dec.
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