Glabrous. Leaves opposite; lamina mostly ovate, 6-18 by 3-9 cm, cuneate at the base to a petiole 5-10 mm long, acuminate and obtuse at the apex, dull on both sides but slightly darker above; venation pinnate with the midrib prominent below and the midrib and main laterals visible above. Inflorescences at the nodes, a 6-flowered head of 2 sessile triads on a peduncle 3-5 mm long. Corolla in mature bud 5-merous, c. 17 mm long, slightly inflated at the base, clavate and obtuse at the apex, angular in the upper part, red. Anther 2-2.5 mm long, about equal to the free part of the filament.
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