" HORKLUMP M.O.M. Classification: X The Horklump comes from Scandinavia but is now widespread throughout northern Europe. It resembles a fleshy, pinkish mushroom covered in sparse, wiry black bristles. A prodigious breeder, the Horklump will cover an average garden in a matter of days. It spreads sinewy tentacles rather than roots into the ground to search for its preferred food of earthworms. The Horklump is a favourite delicacy of gnomes but otherwise has no discernible use. H "

― , Fantastic Beasts and Where to Find Them (Hogwarts Library)