Glabrous except for the inflorescence and ovary thinly tomentose. Leaves opposite; lamina elliptic to ovate, 4-7 by 2-5 cm, shortly cuneate at the base to a petiole c. 2 mm long, shortly acuminate and acute at the apex, lustrous above, dull below; venation pinnate but almost curvinerved, with the midrib distinct on both sides and the main laterals distinct above. Inflorescences at the nodes, along the internodes and on the epicortical runners, a single pedicellate flower on a slender ebracteate peduncule about 2 mm long ( i.e. a flower on a jointed 'pedicel'); pedicel 0.5-1 mm long, funnel-shaped, with a single bract. Corolla in mature bud 4-merous, c. 40 mm long, quadrangular, acute at the apex, mostly red below and paler red or yellow above. Anther c. 5 mm long, about equal to the free part of the filament. Fig. 6a, b.
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