Maerua crassifolia.
Botanical name:
Maerua crassifolia Forsk. Capparideae.
Arabia. This is an arborescent shrub called in Yemen maeru. Its fruit is eaten by boys.
Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.