Description - from Wikipedia

Barleria obtusa, the bush violet, is a species of flowering plant in the family Acanthaceae. It occurs naturally along forest margins in the summer rainfall region of South Africa (Free State, KwaZulu-Natal, and the Northern Provinces) and in Mozambique. It is widely cultivated as a decorative garden shrub.

Uses
In tropical Africa, the leaves are cooked as a vegetable, and the plant is used medicinally.

References
External links
Species account. Advice on cultivation
Barleria obtusa Nees