Sometimes scandent herb to 4m long with hispid stems. Leaves to 80 mm x 68mm, pilos above & puberulous beneath, lobulate-serrate margins. 4-20 flowered cymes with bracts 51mm x 34mm, light green sepals to 13mm x11mm, yellow corolla, upper lip to 10mm x 12mm, lower lip to 33mm x 23mm. Hirsute to puberulous capsule 7mm long,