Climbers woody, with ± yellowish pubescent axial parts. Stems striate; young parts densely sericeous, later glabrescent. Petiole 1.5-8 cm; leaf blade broadly ovate-cordate, 6-11 X 5-9 cm, abaxially densely yellowish white sericeous-tomentose, adaxially glabrous, base shallowly cordate to ± truncate, apex acute to acuminate; lateral veins 7-12 pairs, prominent abaxially. Inflorescences axillary, cymose, 4-6-flowered; peduncle 1.5-2 cm; bracts early deciduous, ovate, 4-6 mm. Pedicel 6-8 mm. Sepals ovate-oblong, slightly concave, subequal, 6-8 X 3-5 mm, densely sericeous abaxially, glabrous adaxially, apex rounded to obtuse. Corolla deeply 5-lobed; tube ca. 5 mm; lobes oblong, reflexed, 1.3-1.5 cm, densely pilose outside, glabrous inside. Stamens and pistil exserted; filaments ca. 1 cm; anthers 3-4 mm. Ovary ovoid, glabrous, 2-loculed. Style filiform, ca. 1.5 cm; stigma 2-lobed. Fruit reddish, globose. Seeds 4 or fewer, ovoid-trigonous. Fl. Oct, fr. Jan.
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