Glabrous. Stem internodes quadrangular when young. Leaves opposite; lamina ovate, 5-8 by 2-5 cm, truncate at the base to a distinct petiole 10-20 mm long, rounded or obtuse at the apex, dull on both sides; venation pinnate with the midrib distinct above and raised below and the main laterals visible on both sides. Inflorescencess at the nodes; axis c. 5 mm long, 5-7 mm wide; involucral bracts in 7-9 pairs, the longest inner ones oblong, 14-20 mm long, remaining appressed after anthesis; flowers in 2-4 pairs of sessile triads, all with pedicels 0.2-0.3 mm long. Corolla in mature bud 6-merous, 20-26 mm long, gradually widened upwards, obtuse at the apex, red or orange or yellow,sometimes greenish yellow above and/or crimson at the tip; tube in the open flower c. 8 mm long and the lobes reflexed 7-12 mm higher. Anther 1.5-2 mm long; free part of the filament 2-5 mm long.
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