Note 543 — BOOK XXV. THE NATURAL HISTORY OF THE WILD PLANTS.

Lipsius, in his Commentaries upon Tacitus, Ann. i. 63, has very satisfactorily shown that it did not derive its name from the islands of Britain, but from a local appellation, the name given by the natives to the marshy tracts upon the banks of the Ems, between Lingen and Covoerden, which are still known as the “Bretaasche Heyde.” Munting and Poinsinet de Sivry suggest that it may have received its name from being used as a strengthener of the teeth in their sockets, being compounded of the words tann, “tooth,” and brita, “to break.”