Gynandropsis pentaphylla.

Botanical name: 

Gynandropsis pentaphylla DC. Capparideae.

Cosmopolitan tropics. This plant is a well-known esculent in the Upper Nile and throughout equatorial Africa as far as the Congo. In India, the leaves are eaten by the natives, and the seeds are used as a substitute for mustard and yield a good oil. In Jamaica, it is considered a wholesome plant but, from its being a little bitterish, requires repeated boilings to make it palatable.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.