Salad rocket grows 20–100 centimetres (8–39 in) in height. The leaves are deeply pinnately lobed with four to ten small lateral lobes and a large terminal lobe. The flowers are 2–4 cm (0.8–1.6 in) in diameter, arranged in a corymb in typical Brassicaceae fashion; with creamy white petals veined with purple, and with yellow stamens; the sepals are shed soon after the flower opens. The fruit is a siliqua (pod) 12–35 millimetres (0.5–1.4 in) long with an apical beak, and containing several seeds (which are edible).
Vernacular names include salad rocket, garden rocket, or simply rocket (British, Australian, Canadian, South African and New Zealand English), eruca, and arugula (American English). All English language names ultimately derive from the Latin word eruca, a name for an unspecified plant in the family Brassicaceae, probably a type of cabbage. In Arabic it is known as Gargeer (جرجير).Salad rocket typically grows on dry, disturbed ground. and is also used as a food by the larvae of some moth species, including the Garden Carpet moth. Arugula roots are also susceptible to nematode infestation.
- 1 cm