Large liana climbing to tree-tops. Branchlets obtusangular and glabrous distally, terete below, 10 mm ø in flower-bearing parts. Leaves lax, ovate to elliptic, apex gradually shortly obtusely acuminate, base obtuse to rounded, ± basal glands ± distinct, coriaceous, glabrous, sparsely punctate beneath, 5-7-plinerved from and from up to 1.5 cm above base, 6-13 by 3-6 cm, midrib and nerves slightly sulcate above except base of midrib, prominent beneath, reticulation ± inconspicuous or none; petiole 6-10 by c. 2 mm. Flowers 4-8 per fascicle, usually from defoliate axils or old wood. Pedicels (very) slender, glabrous, 1.6-3 cm. Calyx tube subcylindric, minutely muriculate or glabrous, rugulose, base truncate to rounded, c. 2.5 mm, limb subpatent, shortly 5-lobed, 1.5 mm, lobes apiculate. Corolla campanulate, orange-red (fresh), short-hairy, c. 1 cm, c. 8 mm ø at limb, lobes triangular, c. 3 mm. Stamens 5 and 4.2 mm; major stamens: filaments sparsely patently hairy in the apical part, 2.5 mm; cells narrow-oblong (each cell ending in a basal tooth), divergent, 3.5-4 mm including the ear-shaped, c. 2 mm long tubules; processes visible as a small, laxly to subdensely hairy, narrow ribbon on the back of each tubule, free in its uppermost part as a minute tooth, or ± evanescent towards the apex of the tubules. Disk puberulous. Style filiform, glabrous, 1.2-1.4 cm.
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