Botanical name: Raphionacme longifolia
Common name: Raphionacme
Family: Apocynaceae (Formerly:Asclepiadaceae)
Subfamily: Asclepiadoideae
Origin: South Africa
Small growing tuberous rooted vine. The flowers are greenish-purple. In cultivation the plants are usually grown in semi shade, with the tubers wholly or partially exposed to prevent scorching and rotting of the roots.
Similar plants: Raphionacme longifolia (Raphionacme )
Link to this plant:
https://toptropicals.com/catalog/uid/raphionacme_longifolia.htm