Stems stout, to 1 m, glabrous. Petiole 0.5-2 cm, robust; leaf blade obovate to orbicular, 4-6 × 5-6 cm, base rounded to broadly cuneate, margin revolute, apex retuse, sinus to 1 cm wide, glabrous; lateral veins obscure. Pseudumbels 4-5 cm in diam.; peduncle 2-3 cm. Pedicel 1.3-1.8 cm, slender, puberulent. Sepals ca. 2.5 mm, puberulent. Corolla papillate-puberulent, reflexed; lobes ovate-triangular, 4-5 × ca. 4 mm. Corona lobes reddish, furrowed on back, outer angle rounded, apical part concave, ca. 2.5 mm. 2n = 22.
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