Leichhardtia mackeeorum

Leichhardtia mackeeorum is a slender twining vine growing to 3 m. It has white latex. The smooth leaves are differently coloured on their upper and lower surfaces (discolorous), on petioles (stems) which are 5–10 mm (0.20–0.39 in) long. They are linear to elliptic and 5–13 cm (2.0–5.1 in) long by 0.7–0.9 cm (0.28–0.35 in) wide, rounded at the base and pointed at the tip, and have revolute margins. Vegetatively, this species differs little from Marsdenia microstoma, but is distinguished from it by its bostrychoid inflorescence on a rachis which continues to grow and flower, whereas M. microstoma has a different inflorescence type and all the flowers on it open at the same time.