Description - from Wikipedia

Commelina africana, the common yellow commelina, is a widespread species of flowering plant in the family Commelinaceae. It is native to Sub‑Saharan Africa, Madagascar, Réunion, and the Arabian Peninsula, and has been introduced to India. It is occasionally consumed as a leaf vegetable, and occasionally fed to rabbits and pigs.

Subtaxa
The following subtaxa are accepted:

Commelina africana subsp. africana
Commelina africana var. glabriuscula (Norl.) Brenan – Southern Africa, Rift Valley
Commelina africana var. karooica (C.B.Clarke) Govaerts – Namibia, Botswana, South Africa
Commelina africana var. krebsiana (Kunth) C.B.Clarke – Namibia, Botswana, South Africa, Mozambique, Zimbabwe, Comoros
Commelina africana var. lancispatha C.B.Clarke – Sierra Leone, eastern, central and southern Africa
Commelina africana var. milleri Brenan – Namibia, Botswana, Northern Provinces, Zimbabwe, Zambia, Malawi, Kenya, Tanzania, Uganda
Commelina africana var. villosior (C.B.Clarke) Brenan – Most of range
Commelina africana subsp. zanzibarica Faden – Kenya, Tanzania, and introduced to India


== References ==