Cynanchum ovalifolium Wight
Wight, R. (1834) Contrib. Bot. India : 57. Type: India?, Penang, Aug 1827, collector unknown; holo: K - W 8226.
A slender vine not exceeding a stem diameter of 2 cm.
Inflorescence umbelliform, flowering over an extended period of time. Calyx lobes triangular, about 1.5 mm long. Corolla tube about 1 mm long, lobes narrowly triangular, about 7 mm long and usually twisted towards the apex. Stamens fused together to form a structure about 1.8-2.5 x 1.25-1.8 mm. Carpels about 1.5 mm long. Styles free at the base but fused to form a domed style head at the apex.