Atriplex hortensis, known as garden orache, red orache or simply orache (; also spelled orach), mountain spinach, French spinach, or arrach, is a species of plant in the amaranth family used as a leaf vegetable that was common before spinach; it is still grown as a warm-weather alternative to spinach. For many years, it was classified in the goosefoot family (Chenopodiaceae), but it has now been absorbed into the Amaranthaceae. It is Eurasian, native to Asia and Europe, and widely naturalized in Canada, the United States, Australia, and New Zealand.

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