Climbing shrub or liana 1.8–30 m high; bark light yellow-orange, thick, corky; inner bark with rope-like fibres; wood creamy; branches pale to dark brown, with many whitish lenticels; branchlets brownish to greyish green, puberulous to pubescent. Leaves petiolate; blade obovate, (1.8–)4.6–14.5 cm long, 1.2–5.5 cm wide, acuminate, rarely emarginate at the apex, base cuneate, glabrous, rarely pubescent, with 2–7 pairs of secondary veins; tertiary venation conspicuous, scalariform; domatia of pits with a dense tuft of hispid hairs along the margin; petiole 5–12 mm long, puberulous or pubescent, with 2 pairs of glands along the adaxial side, one pair near the proximal end of the midrib. Inflorescence 2.5–6.5 cm long, rusty brown-pubescent; bracts up to 3.1 mm long; pedicels 1.2–4 mm long. Flowers with sepals elliptic to triangular, 1.2–3.2 mm long, 0.8–1.5 mm wide, rusty brown pubescent or puberulous; corolla yellow-green, tube barrel-shaped, 2.5–3.8 mm long, lobes 3–7.3 mm long, 0.7–1.5 mm wide, glabrous or puberulous outside; corona 0.4–1 mm long; stamens inserted 0.5–1 mm from the base of the tube; pistil 2.8–3.3 mm long; style 0.1–0.3 mm long; ovules 15–45 in each carpel. Fruits pendulous, narrowly cylindrical, tapering at both ends, 10.5–30 cm long, 0.4–1.3 cm wide, greyish to dark brown-pubescent; seeds up to 35 in each follicle; seed 12–23 mm long, coma 25–58 mm long. Fig. 35 (p. 108).