Family: Apocynaceae

Form: Clambering vine that can be maintained as a shrub

Leaves: Simple, opposite or whorled, elliptic prominent lateral venation

Stem/Bark: Smooth, glabrous becoming woody with age.

Flower: Large yellow corolla, funnel form in cymes

Fruit: Dehiscent follicle, spiney

Comments: A. schottii is a similarly related species with more of a shrub form.