Glabrous. Leaves opposite, sometimes seemingly superposed; lamina ovate, 20-30 (-50) by 7-10(-19) cm, truncate to cordate at the base, subsessile or with a petiole to 2 mm long, often bullate between the veins, acuminate and acute at the apex, lustrous above, dull below; venation pinnate with the midrib and the main laterals distinct on both sides. Inflorescences at the nodes and on the epicortical runners, a raceme of 2-6 opposite crowded pairs of flowers; axis 5-10 mm long, subtended at the base by an involucre of broad short bracts; pedicels 1-2 mm long; bracts erect, acuminate, 3-5 mm long. Corolla in mature bud 6-merous, 50-85 mm long, slender in the lower part, clavate, winged and acute at the apex, red or orange below and yellow or greenish above; tube in the open flower 28-60 mm long with the narrowly spathulate lobes reflexed 5-7 mm higher. Anther 4-5 mm long, saggitate at the base, subacute; free part of the filament about twice as long, gradually widened upwards. Fig. 38a.
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