Glabrous except for the young inflorescence involucre sometimes shortly brown tomentose. Leaves opposite; lamina oblong to ovate, 5-18 by 2-7 cm, shortly cuneate or truncate at the base to a winged petiole 3-12 mm long, very slightly acuminate and acute at the apex, glossy above, dull below; venation pinnate with the midrib and the main laterals obscure. Inflorescences at the nodes; axis 1-2 mm long, c. 3 mm wide, enlarging in fruit; involucral bracts in c. 5 pairs, the longest inner ones sagittate, keeled, acuminate, 15-23 mm long, spreading and possibly deciduous after anthesis; flowers in 2 or 3 pairs of sessile triads, all with pedicels 1.5-2 mm long. Corolla in mature bud 6-merous, 21-45 mm long, slender, gradually widened upwards, obtuse at the apex, red or yellow below, sometimes green above; tube in the open flower 9-18 mm long and the lobes reflexed 7-19 mm higher. Anther 1-3 mm long; free part of the filament 0.75-2 mm long. Fig. 29c-e.
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