Glabrous. Lateral leaflets ovate to ovate-oblong, 40-65 x 33-45 mm, entire, acuminate, base subcordate; terminal leaflet modified into a long coiled, 3-clawed tendril. Bracts 1-1.5 mm long. Flowers orange. Calyx campanulate, c. 5 mm long, truncate with a 5-toothed rim; teeth c. 0.8 mm long, subulate, pubescent. Corolla tube slender, c. 45 mm long, lobes 5,broad linear, pubescent. Filaments of longer stamens 40 mm long. Style c. 50 mm long, stigma lobes oblong. Capsule not seen.