Glabrous except for the inflorescence very rarely papillose hairy. Leaves opposite; lamina more or less ovate, (5—)8—12(—18) by 1.5-6 cm, shortly cuneate to truncate or very rarely cordate at the base to a petiole (3—)6—15(—18) mm long, usually slightly to strongly acuminate and acute at the apex but sometimes finally rounded, shining or glossy above, dull and paler below; venation pinnate, visible on the upper surface, with only the midrib raised, dark coloured and visible below. Inflorescences at the nodes, a short sometimes subumbellate raceme of 2-4 opposite pairs of flowers; axis usually slender, 3—10(—16) mm long (or slightly longer in fruit), often subtended at the base by an involucre of a few acuminate prophylls; pedicels slender, (l-)2-4 mm long (to 5 mm in fruit). Corolla in mature bud 6-merous, (15-)20-30(-35) mm long, usually slender, slightly inflated and weakly 6-ribbed or 6-winged at or above the middle, clavate, angular and usually acute at the apex, mostly pink or red or orange, with a dark band at the neck and grading to yellow or green above; tube in the open flower mostly 12-18 mm long with the lobes reflexed 2-3 mm higher. Anther 1.5-3 mm long, about two thirds as long as the free part of the filament. Fig. 36b, c.
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