Glabrous. Leaves opposite; lamina oblanceolate to narrowly spathulate, 5-7 by 1-2 cm, gradually attenuate at the base to an obscure petiole 5-10 mm long, rounded at the apex, dull on both sides; venation pinnate with the midrib and the main laterals raised below but indistinct. Inflorescencess at the nodes, pedunculate 4-rayed umbels of triads with all flowers sessile; peduncle 13-15 mm long; rays 5-8 mm long. Corolla in mature bud 4-merous, 26-30 mm long, uniformly slender, quadrangular when dry, acute at the apex, red below and yellow above. Anther c. 2.5 mm long, with a short knob-like sterile tip, about half as long as the free part of the filament.
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