Glabrous. Leaves opposite; lamina narrowly ovate to ovate, 6-16 by 2-6 cm, usually attenuate to cuneate at the base to a petiole 5-10 mm long, attenuate or acuminate and acute or obtuse at the apex, thin and wrinkled and fragile when dry, dull on both sides or very slightly darker and more lustrous above; venation pinnate with the midrib and the main laterals distinct on both sides. Inflorescencess at the nodes, a raceme of 3-6 opposite evenly spaced pairs of triads with all flowers sessile; axis 20-40 mm long; peduncles of the triads 0.5-1.5 mm long, secund. Corolla in mature bud 6-merous, 22-30 mm long, inflated at the base, slender in the middle, weakly clavate and obtuse at the apex, mostly red below and yellow or green above; petals in the open flower separating to the inflated basal part. Anther 3-4 mm long, acute, slightly shorter than the free part of the filament.
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