Hemiepiphytic climbing herb, tree or subshrub to 2m, glabrescent stems with lenticels. Leaves to 320mm x 125mm, glabrous above, silky beneath. Axillary fascicles of 4-8 flowers with 5-10 bracts to 35mm x 20mm, green or yellow calyx with 5 lobes to 25mm x 9mm with serrulate margin, corolla green to 42mm long with lobes to 3mm x 1.5mm.