Vigorous, evergreen, glabrous liane. Leaflets (5)-7-9, 2-7 × 1-3 cm (larger on strong vegetative shoots), usually lanceolate-ovate, sometimes ovate to broadly oblong-elliptic, serrate, becoming serrulate towards infl.; base cuneate, rounded, truncate, often asymmetric; apex short- to long-acuminate; petiolule to 1 cm long. Panicle many-flowered; peduncles and pedicels purplish. Calyx 1.2-1.8-(2) cm long, pinkish; teeth 4-7 mm long, triangular; apiculus c. 1 mm long. Corolla 6-8 cm long, pink with rose-red veins, especially inside tube; limb broader than high; lobes 1.2-2 cm long, suborbicular. Filaments with numerous short-stalked yellow glands at base. Style < to slightly > longer stamen pair, 2-3 cm long. Capsule rarely formed, 16-26 cm × 5-10 mm; valves coriaceous. Seed wings nearly 1 cm wide.