Woody vine. Branches shallowly 6-8-sulcate, densely puberulous or velutinous, rarely sparsely puberulous. Leaves usually once pinnate, 5-7-foliolate, sometimes twice pinnate; leaflets papery, ovate or broadly ovate, 1.5-8(-11) x1.2-6(-10) cm, apex acuminate or acute, base subcordate, cordate, or rounded, margin dentate or denticulate, usually 3-lobed or 3-lobulate, sometimes undivided, on both surfaces densely or sparsely appressed-puberulous, abaxially sometimes velutinous, more or less reticulate; petioles 1-5.4 cm long. Cymes axillary and terminal, 5-many-flowered, often panicle-like; peduncles 1-9 cm long; bracts ovate, 3-lobed or undivided. Flower 2-3.5(-4) cm in diam.; pedicel 1-2.5(-3.5) cm long, densely puberulous. Sepals white, oblong-lanceolate, 1-19(-24) x 4-7(-8) mm, apex acute, inside more or less densely puberulous, outside densely puberulous, margin velutinous. Stamens 9-11 mm long; filaments narrowly linear, near base sericeous-puberulous; anthers oblong or narrowly oblong, (1-)1.5-2(-2.5) mm long, glabrous, apex obtuse. Ovaries densely puberulous; styles 6-11 mm long, densely villous. Achenes compressed, broadly elliptic, 3-3.5 x 2.5-3 mm, puberulous; persistent styles 2.5-3.5 cm long, plumose.
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A tall climbing shrubby plant (more rarely decumbent in grassland), 1–4 m. or more tall; younger stems more or less softly hairy but usually becoming glabrous or nearly so, longitudinally ribbed and furrowed.. Leaves pinnate with 5 leaflets, rarely bipinnate, frequently well developed leaves are associated with the inflorescence; leaflets suborbicular to ovate in general outline, acuminate, shortly acuminate, acute, or subobtuse, cordate to rounded rarely truncate at base, most often a longer central lobe with a shorter lateral one on each side, crenate-dentate with teeth of different sizes, from almost glabrous to lanate on lower surface, glabrous to more or less pubescent on upper surface.. Inflorescences generally many-flowered; pedicels 1–3 cm. long; flower buds spherical to ellipsoid, rounded to acuminate.. Sepals 1–2.7 cm. long, cream or white.
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