Vines woody. Branches shallowly 10--12-grooved, sparsely puberulous, glabrescent. Leaves pinnate, (3--)5-foliolate; petiole 2.2--5.8 cm, sparsely puberulous or glabrous; leaflet blades linear-lanceolate, lanceolate, or ovate, 4--11 × 1--3.2 cm, papery to subleathery, both surfaces glabrous, base rounded to broadly cuneate, margin entire, apex attenuate, acute, or obtuse; basal veins abaxially ± prominent. Cymes axillary or terminal, 3--7-flowered; peduncle 3.8--7 cm; bracts foliaceous or simple, linear to lanceolate, 0.5--5.5 cm. Flowers 2.6--5 cm in diam. Pedicel 1.2--4 cm, puberulous or glabrous. Sepals 4 or 5, white, spreading, narrowly oblong to obovate-oblong, 1.3--2.5 × 0.3--0.7 cm, abaxially puberulous to subglabrous, adaxially glabrous, margin abaxially velutinous, apex ± obtuse. Stamens 0.7--1.5 cm, glabrous; anthers narrowly oblong to oblong, 2--3 mm, apex obtuse or minutely apiculate. Ovaries pubescent. Style 6--7 mm, densely villous. Achenes elliptic to ovate, 5--5.5 × 2.8--3.5 mm, pubescent; persistent style ca. 5 cm, plumose. Fl. Jun--Aug, fr. Jul--Oct.
Home