Gurdyroot

Gurdyroot is a plant resembling a green onion, according to Luna Lovegood it is excellent for warding off Gulping Plimpies. Luna and her father, Xenophilius Lovegood, make a drink with this plant, which they call a Gurdyroot Infusion, which has a bogey-like taste. The Gurdyroot was mentioned in the radio program Toots, Shoots 'n' Roots.