Atriplex hortensis, also known as garden orache, red orach, mountain spinach, French spinach, or simply orache or arrach, is a Eurasian species of plant in the amaranth family (for many years classified in the goosefoot family). It is native to Asia and Europe, and widely naturalized in Canada, the United States, Australia, and New Zealand.Atriplex hortensis is a hardy, annual plant, with an erect, branching stem, varying in height from two to six feet, according to the variety and soil.