Woody, glabrous climber. Leaves with terminal leaflet replaced by trifid tendril; tendril lobes 10–15 mm long; lateral leaflets ovate to oblong-elliptic, 2–7 cm long, 10–30 mm wide, margins entire to obscurely toothed; petiole 10–20 cm long. Calyx broadly campanulate, truncate or sinuately c. 3-lobed, without an apicule; corolla bilabiate, with upper two lobes reflexed and lower lobes pointing forward, yellow with orange lines in tube, 4–8 cm long; lobes to 20 mm long; anther included in corolla throat; stigma included in corolla throat. Capsule linear, 15–45 cm long, 8–12 mm wide; seed 20–40 mm long. Flowers spring.
VVP. Also naturalised Qld, NSW. Native to southern U.S.A south to Argentina. A rare garden escape in the Melbourne suburb of Northcote.
A weed of national significance that has become a threat to riparian and rainforest communities in southern Queensland and northern New South Wales. The Tingid Bug Carvalhotingis visendais being used as a biological control agent in these areas.
