Glabrous except for the inflorescence and ovary white-tomentose and the corolla sparsely so. Leaves opposite or ternate, frequently scattered; lamina lanceolate to ovate, 5-12 by 2-6.5 cm, shortly cuneate to weakly cordate at the base to a petiole 5-25 mm long, mostly acuminate and acute at the apex, dull on both sides; venation pinnate with the midrib visible above and prominent below. Inflorescences at the nodes and on the epicortical runners, pedunculate 10-to 30-rayed umbels of triads with all flowers sessile; peduncle 8-25 mm long, dilated at the apex; rays 1-6 mm long. Corolla in mature bud 5-merous, 25-30 mm long, slightly dilated at the base, clavate and obtuse at the apex, pink or red and sometimes shading to green above. Anther 1.5-2.5 mm long, about half as long as the free part of the filament.
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