Maerua crassifolia is a species of plant in the Capparaceae family. It is native to Africa, tropical Arabia, and Israel, but is disappearing from Egypt. Foliage from this plant is used as fodder for animals, especially camels, during the dry season in parts of Africa. The plant grows commonly in Yemen, where it is called Meru. In the 18th century the plant's Arabic name Meru was used as the source for the genus name Maerua. The 18th-century taxonomist was Peter Forskal, who visited Yemen in the 1760s.