Spinach (Spinacia oleracea) is an edible flowering plant in the family of Amaranthaceae. It is native to central and southwestern Asia. It is an annual plant (rarely biennial). Spinach may survive over winter in temperate regions. The leaves are alternate, simple, ovate to triangular-based, very variable in size, with larger leaves at the base of the plant and small leaves higher on the flowering stem. The flowers are inconspicuous, yellow-green, maturing into a small, hard, dry, lumpy fruit cluster containing several seeds.
Contributions by Alexxx1, Dposse, and SB Johnny.