Glabrous except for young internodes and sometimes the inflorescence and flowers sparsely brown tomentose and soon glabrescent. Leaves scattered, subopposite or sub-verticillate; lamina elliptic or ovate, 6-15(-20) by (0.8-)1.5-6 cm, attenuate or cuneate at the base to a petiole 8-15 mm long, irregular at the apex but normally somewhat attenuate and acute, dull or slightly glossy above, dull below; venation pinnate with the midrib distinct on both sides, the lateral veins usually distinct above and the many parallel tertiary veins obscure but forming a finely striate pattern above. Inflorescences at the nodes and rarely terminal, a few-to 25-flowered raceme; axis 50-250 mm long, angular; pedicels (1—)5—18(—27) mm long; bracts simple, rounded, 1-1.5 mm long. Ovary cylindric, 5-8 mm long; calyx limb spreading, 1-1.5 mm long. Corolla in mature bud 5-merous, (15-)22-32(-40) mm long, often slightly inflated up to 3 mm wide in the lower 2-4 mm, gradually narrowed upwards, acute at the apex, mostly orange-red to bright red, sometimes yellow or yellow-green. Anther 5-8 mm long, acute, about two thirds as long as the free part of the filament. Style 15-32(-38) mm long, reaching to the top of the anthers, uniformly slender throughout and lacking a constriction; stigma capitate, slightly wider than the style. Fig. 26d, e.
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