The beetroot is the taproot portion of a beet plant, usually known in north america as beets while the vegetable is referred to as beetroot in british english, and also known as the table beet, garden beet, red beet, dinner beet or golden beet. it is one of several cultivated varieties of beta vulgaris grown for their edible taproots and leaves (called beet greens); they have been classified as b. vulgaris subsp. vulgaris conditiva group.other cultivars of the same species include the sugar beet, the leaf vegetable known as chard or spinach beet, and mangelwurzel, which is a fodder crop. three subspecies are typically recognized.

Source: Wikipedia