Eruca is a genus of flowering plants in the family Brassicaceae, native to the Mediterranean region, western and Central Asia, and China. It includes the leaf vegetable known as rocket or arugula.
The species can be either annual or biennial, growing to 20âÂÂ100 cm tall. The leaves are deeply pinnately lobed with four to ten small lateral lobes and a large terminal lobe. The flowers are 2âÂÂ4 cm diameter, arranged in a corymb, with the typical 4-petal, 4-sepal Brassicaceae flower structure; the petals are creamy white with purple veins, and the stamens yellow. The fruit is a siliqua (pod) 12âÂÂ25 mm long with an apical beak, and containing several seeds.
The number of species is disputed, with some authorities only accepting a single species, while others accept up to six species. Plants of the World Online accepts six species:
When treated as a monospecific genus, all are included within E. vesicaria.