Glabrous except for the inflorescence and flowers very rarely shortly and sparsely tomentose. Leaves mostly in whorls of 5-8; lamina variable, lanceolate to ovate or rarely broadly ovate or obovate, 5-20 by 2.5-7 cm, attenuate, cuneate or rarely truncate at the base to a petiole 3-15 mm long, mostly acute or obtuse or less often rounded at the apex, dull on both sides or with the upper surface somewhat glossy; venation pinnate with the midrib raised below, otherwise obscure. Inflorescences at the nodes and along the epicortical runners, pedunculate 4-to 8-rayed umbels of triads with all flowers sessile; peduncle mostly 6-12 mm long; rays 3-10 mm long. Corolla in mature bud 5-or 6-merous, 20-40 mm long, slender, acute or shortly rounded at apex, various shades of red. Anther 2.5-4 mm long, about one third as long as the free part of the filament. Fig. 8a, b.
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