Atriplex ( /ˈætrɨplɛks/ Á-tri-plex) is a plant genus of 100-200 species, known by the common names of saltbush and orache (or orach). The genus is quite variable and widely distributed. It includes many desert and seashore plants and halophytes, as well as plants of moist environments. The goosefoot subfamily (Chenopodioideae) of the Amaranthaceae, in which the genus Atriplex is placed in the APG II system, was formerly considered a distinct family (Chenopodiaceae).
The generic name originated in Latin and was applied by Pliny the Elder to the edible oraches.
Saltbushes are extremely tolerant of salt content in the ground: their name derives from the fact that they retain salt in their leaves, which makes them of great use in areas affected by soil salination.
Atriplex species are used as food plants by the larvae of some Lepidoptera species; see the list of Lepidoptera which feed on Atriplex. For spiders such as Phidippus californicus and other arthropods, saltbush plants offer opportunities to hide and hunt in habitat that is otherwise often quite barren.