Glabrous except for a few scattered hairs on the inflorescences and flowers. Leaves opposite; lamina narrowly lanceolate, 4-7 cm long, mostly 0.4-0.7 cm wide, attenuate at the base to a petiole 1-3 mm long, acuminate and acute at the apex, dull on both sides, often rolled when dry; venation obscure. Inflorescences at the nodes, pedunculate 3-or 4-rayed umbels of triads with the central flowers sessile; peduncle mostly 8-15 mm long, slender; rays c. 8 mm long, slender, wider towards the apex; pedicels of the lateral flowers 2-3 mm long. Corolla in mature bud 4-merous, c. 18 mm long, very slender, rounded at the apex, red or purple below and green or yellow above. Anther c. 2 mm long, about half as long as the free part of the filament.
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