Twiner with glabrous lenticellate stems to 4.5m. 5-lobed leaves 150mm x 150mm verrucose above pubescent beneath. Racemes with small bracts, glabrous dark violet flowers to 30mm x 25mm with yellowish spots, hairy within, tube to 70mm x 8mm expanding to 40mm at apex, 3-lobed limb hairy inside. 6-ridged capsule.