Alliaria. Alliaria officinalis Andrz. [Sisymbrium Alliaria, Scop. Erysimum Alliaria, L. Alliaria Alliaria (L.) Brit.] Hedge Garlic.—A perennial European herb, a native also of Northern Asia, and naturalized from Canada to Virginia, having an alliaceous odor when rubbed, and a bitterish, somewhat acrid taste. When eaten it communicates its odor to the breath. Wertheim obtained from the root a volatile oil, apparently identical with that of mustard. (Ann. Ch. Ph., liii, 52.) The herb and seeds are esteemed diuretic, diaphoretic, and expectorant, and are used as external applications in gangrenous affections, and to promote suppuration.