Glabrous. Leaves opposite; lamina ovate, 4-12 by 2-5 cm, weakly cordate at the base, sessile, rounded to acuminate and acute at the apex, somewhat glossy above, dull below; venation pinnate with the midrib prominent on both sides and the main laterals distinct above. Inflorescencess at the nodes, a raceme of 5-10 opposite evenly spaced pairs of triads with all flowers sessile or the lateral flowers shortly pedicellate; axis 30-55 mm long; peduncles of the triads 1-2 mm long, secund; pedicels of the lateral flowers 0-0.5 mm long. Corolla in mature bud 6-merous, c. 33 mm long, slender above a rounded base, clavate and obtuse at the apex, purplish red below, white at the neck and light green above; petals in the open flower separating to the base. Anther 2.5-4 mm long, about equal to the free part of the filament. Fig. 18a, b.
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