Armoracia rusticana aka Horse Radish

Armoracia rusticana, also known as horseradish or Cochlearia armoracia, is a root vegetable and perennial herb from the Brassicaceae family, which also includes mustard, wasabi, broccoli, cabbage, and radish. The plant is cultivated and used worldwide as a spice and condiment, and its pungent, fleshy roots are harvested and grated to make sauces and relishes. Native to southeastern Europe and western Asia, this coarse vegetable features large, dock-like, toothed, shiny, dark green leaves and insignificant, whitish flowers that appear in summer in terminal panicles. While it can be grown as an annual or vegetable, it is typically grown as a perennial herb with a deep taproot. The extremely vigorous growth habit of Armoracia rusticana allows it to crowd out most weeds, making it somewhat weed-like, and its spreading growth habit can smother other vegetation if the roots are not harvested each fall. The genus name comes from the classical Latin name of a related plant, while the specific epithet means pertaining to the country.