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Scandent liane to many metres long. Leaves with petiole 25–35 mm long; lamina elliptic, to 17 cm long, to 12 cm wide, cordate at base, acute to acuminate, discolorous; upper surface glossy-green, scabrid, with venation ±visible; lower surface pale green, velutinous, with prominent venation. Flowers 60–70 mm long, 80–90 mm diam.; pedicels 15–20 mm long. Corolla white; tube 30–35 mm long, 5–7 mm diam., increasing to up to 10 mm diam. at apex and base; lobes broadly obovate, 40–45 mm long, 30–38 mm wide. Fruit 30–45 cm long. Seeds oblong, 18–20 mm long.
Lianas to 30 m, hirsute except for flowers. Petiole to 2 cm; leaf blade suborbicular to broadly ovate, 15-45 X 13-45 cm, papery, base cordate, apex acute or rounded, cuspidate; lateral veins 10-12 pairs. Calyx tubular, ca. 1 cm, apex toothed, glabrescent outside. Corolla white, limb to 8 cm wide; tube 3.5-4.5 cm, dilated at base, glabrous outside, throat villous; lobes obliquely obovate, ca. 3.5 cm. Filaments short pubescent. Follicles cylindric to fusiform, to 30 X 2 cm. Seeds oblong, coma ca. 5 cm. Fl. May-Jul. 2n = 20.
A climber. It can be 30 m long. The leaves are broadly oval and 15-45 cm long by 13-45 cm wide. The base is heart shaped. The flowers are tube shaped. The fruit are long follicles 30 cm long by 2 cm wide. The seeds are oblong.
