Blepharis edulis.
Botanical name:
Blepharis edulis Pers. Acanthaceae.
Persia, Northwestern India, Nubia and tropical Arabia. The leaves are eaten crude.
Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.
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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.