Vines woody. Branches inconspicuously 4--6-grooved, sparsely puberulous, glabrescent. Leaves ternate; petiole 2.6--5.5 cm, glabrous; leaflet blades broadly lanceolate, narrowly lanceolate, or narrowly ovate, 2.6--11 × 0.9--3.5 cm, subleathery to papery, undivided or sometimes terminal leaflet 3-lobed to near base, both surfaces glabrous or sparsely puberulous, base rounded, margin entire or sparsely denticulate, apex caudate-acuminate to attenuate; basal veins abaxially prominent. Cymes axillary, 1-flowered; peduncle 4--10 mm; bracts linear to subulate, 2--3 mm. Flowers 1.5--2.5 cm in diam. Pedicel 1.6--2.5 cm, glabrous. Sepals 4, white, erect, ovate-oblong to ovate, 1.5--2.5 × 0.5--1.2 cm, abaxially densely appressed puberulous, adaxially glabrous, apex acute. Stamens 0.7--1.7 cm; filaments densely villous; anthers oblong, 1.8--2 mm, abaxially with a few hairs on connective, apex obtuse. Ovaries pubescent. Style ca. 8 mm, densely villous. Achenes narrowly elliptic to narrowly ovate, 3--5 × ca. 2.5 mm, pubescent; persistent style ca. 3 cm, plumose. Fl. Nov--Feb, fr. Jan--Apr.
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