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Glabrous except for the ovary very rarely sparsely brown-tomentose. Leaves opposite; lamina elliptic to orbicular, mostly 2.5-5 cm long, mostly 1.5-4 cm wide, cuneate at the base to a petiole 3-6 mm long, rounded at the apex, thick, dull on both sides; venation curvinerved, obscure. Inflorescences at the nodes, pedunculate mostly 3-or 4-rayed umbels of triads with the central flowers sessile; peduncle 6-22 mm long; rays 4-10 mm long; pedicels of the lateral flowers 2-5 mm long. Corolla in mature bud 5-merous, 10-28 mm long, slender, clavate and obtuse at the apex, red, yellow or green, sometimes paler above. Anther 1.5-3 mm long, about half as long as the free part of the filament.
Peduncle 6-15 mm long. Ovary strongly funnel-shaped, contracted just below calyx. Corolla 10-20 mm long.
Peduncle 12-22 mm long. Ovary cylindrical to slightly funnel-shaped. Corolla 17-28 mm long.
