Twining perennial to 3m with glabrous or glabrescent stems becoming woody with corky bark when old. Glabrous or pubescent leaves to 40mm x 55mm. Axillary cymes or racemes with 2mm bracteoles, pubescent sepals to 9mm x 4mm, white corolla sometimes with a pink centre, to 50mm long with limb 40mm diameter. Glabrous capsule 8mm x 6mm.