Glabrous. Leaves opposite; lamina narrowly ovate to elliptic, 8-13 by 2.5-5 cm, shortly cuneate to truncate at the base to a petiole 1-4 mm long, attenuate to acuminate and shortly rounded to acute at apex, lustrous or dull above, dull and paler below; venation pinnate with midrib and main laterals visible above and the midrib prominent below; lamina in juvenile state linear, to 15 cm long, 0.5-1 cm wide, otherwise similar to adult leaves. Inflorescences a raceme of 4 or 5 opposite pairs of flowers; axis 8-15 mm long; pedicels 1-3 mm long. Corolla in mature bud 6-merous, 15-25 mm long, inflated in the lower part, winged below the middle, weakly clavate above a long neck and acute at apex, mostly red with one or two black bands at neck and apex; tube in the open flower 4-6 mm long with the narrowly spathulate lobes reflexed 3-5 mm higher. Anther 2-3.5 mm long, obtuse, about half to three fourths as long as the free part of the filament.
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