Glabrous slender woody twiner with lenticellate twigs, pinnate leaves 200mm long with 1-3 pairs leaflets 80mm x 30mm. Axillary & terminal cymes with 2mm bracts, 5-toothed greenish-purple calyx to 6mm long, corolla pinkish-yellow outside to 50mm orange-yellow within with white lobes ageing pale lilac 50mm x 25mm