Vines woody. Branches shallowly 6--8-grooved, sparsely puberulous or glabrous. Leaves 2-ternate; petiole 3--7.5 cm; leaflet blades lanceolate, narrowly ovate, or ovate, 3--6(--8) × 1--2.5(--3) cm, papery, both surfaces sparsely puberulous, glabrescent, base broadly cuneate to rounded, margin irregularly serrate or denticulate, apex attenuate; basal veins abaxially nearly flat. Cymes axillary, 1--3-flowered; peduncle 0.5--1.5 cm; bracts petiolate or sessile, lanceolate to linear, 4--15 mm. Flowers 2--3.5 cm in diam. Pedicel 3--7 cm, sparsely puberulous. Sepals 4, yellow, ascending, oblong, elliptic-lanceolate, or narrowly ovate, 1.5--2.5 × 0.5--0.8 cm, abaxially glabrous except for velutinous margin, adaxially appressed puberulous, apex caudate-apiculate. Stamens 0.8--1.2 cm; filaments puberulous; anthers narrowly oblong, 1.2--2.6 mm, glabrous, apex minutely apiculate. Ovaries pubescent. Style 7--9 mm, densely villous. Achenes elliptic, ca. 3 × 2 mm, pubescent; persistent style ca. 3 cm, plumose. Fl. Aug, fr. Sep--Oct.
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A woody climbing vine. It grows 3 m tall. It loses its leaves during the year.
Forests and forest margins, hedgerows and old walls, rocky and gravelly slopes, riverbanks. Dry forests, slopes, gravelly river banks at around 400 metres in hina.
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It is a temperate plant. It usually grows on limestone soils. In China it grows at about 400 m. It is hardy to hardiness zone 6.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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