Horseradish (Armoracia lapathifolia) is a member of the Brassicaceae (Mustard) Family.    From Wordnik.com.  [Brigitte Mars: 7 Herbs And Spices That Warm You Up] Reference

Horseradish (Armoracia rusticana) is a favorite condiment because of its pungent, spicy flavor, made popular by Arby's and is still used today since it first was offered at the fast food restaurant.    From Wordnik.com. Reference

"Horseradish (Armoracia rusticana) is a hardy perennial plant of the Brassicaceae family, which includes mustard and cabbage.    From Wordnik.com.  [Damn Hell Ass Kings] Reference

Armoracia.    From Wordnik.com.  [Caroli a Linné equit. aur. de stella polari archiatri regii med. et botan. profess. Upsal. Acad ...] Reference

Horse-radish (Armoracia).    From Wordnik.com.  [Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86] Reference

Armoracia rusticana, 64, 299.    From Wordnik.com.  [Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants] Reference