Vines woody. Branches shallowly 5-or 6-grooved, densely puberulous. Leaves pinnate, 1-or 2-ternate; petiole 4.2--9.7 cm; leaflet blades ovate, deltoid, or elliptic, (2.3--)3.7--7.6(--13) × 2--5.6(--10) cm, papery, often 3-lobed, abaxially usually densely sericeous-puberulous to rarely sparsely puberulous, adaxially sparsely puberulous or glabrous, base cordate, obtuse, or cuneate, margin coarsely dentate, apex acuminate to narrowly acuminate; basal veins abaxially ± prominent. Cymes axillary, usually many flowered; peduncle 3.2--6.4 cm; bracts elliptic to lanceolate, undivided or 3-lobed. Flowers 1.5--2.5 cm in diam. Pedicel 1.6--2 cm, densely puberulous. Sepals 4, white, spreading, obovate-oblong to obovate-lanceolate, 9--15 × 3--5 mm, abaxially densely puberulous, adaxially puberulous, apex acute. Stamens 4--8 mm, glabrous; anthers oblong, 1.2--2 mm, apex obtuse. Ovaries puberulous. Style 5--7 mm, densely villous. Achenes narrowly elliptic to fusiform, 2.5--3 × 1.2--1.5 mm, puberulous; persistent style 1.6--3 cm, yellowish plumose. Fl. Apr--Sep, fr. Aug--Sep.
Home