Herbs, erect or twining to 4 m, pilose throughout. Rootstock fleshy. Leaves opposite; petiole 2-4 cm; leaf blade triangular to circular, 4-10 × 2.5-8.5 cm, base shallowly cordate, margin subundulate, apex rounded-cuspidate to acute; basal veins 3-5, lateral veins (2 or) 3-6 pairs. Inflorescences umbel-like, 5-8-flowered; peduncle 2-3 cm. Pedicel 2-3 cm. Sepals lanceolate or narrowly triangular, (2-)3.5-5 × 1-1.5 mm, minutely hirsute; basal glands 5. Corolla white, rotate to reflexed; lobes oblong, 5-10 × 2.5-4 mm, puberulent. Corona deeply 5-lobed; lobes ovate-oblong, ca. 5 mm, apex subobtuse and longer than gynostegium, with rounded, adaxial appendages incumbent on anther. Pollinia oblong. Fl. Aug.
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