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HOREHOUND (0. Eng. harhune, Ger. Ando...

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Originally appearing in Volume V13, Page 692 of the 1911 Encyclopedia Britannica.
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HOREHOUND (0. Eng. harhune, Ger. Andorn, Fr. marrube)  . See also:Common or See also:white See also:horehound, Marrubium vulgare, of the natural See also:order See also:Labiatae, is a perennial See also:herb with a See also:short stout rootstock, and thick stems, about i ft. in height, which, as well as their numerous branches, are coated with a white or hoary See also:felt—whence the popular name of the plant . The leaves have See also:long petioles, and are roundish or rhombic-ovate, with a bluntly toothed margin, much wrinkled, white and woolly below and See also:pale See also:green and downy above; the See also:flowers are sessile, in dense whorls or clusters, small and dull-white, with a ro-toothed calyx and the upper See also:lobe of the corolla long and bifid . The plant occurs in See also:Europe, See also:North See also:Africa and See also:West See also:Asia to North-West See also:India, and has been naturalized in parts of See also:America . In See also:Britain, where it is found generally on sandy or dry chalky ground, it is far from common . White horehound contains a volatile oil, See also:resin, a crystallizable See also:bitter principle termed marrubiin and other substances, and has a See also:net unpleasant aromatic odour, and a persistent bitter See also:taste . Formerly it was See also:official in See also:British pharmacopoeias; and the infusion, See also:syrup or confection of horehound has long been in popular repute for the treatment of a See also:host of dissimilar affections . See also:Black horehound, Ballota See also:nigra, is a hairy perennial herb, belonging to the same order, of foetid odour, is 2 to 3 ft. in height, and has stalked, roundish-ovate, toothed leaves and numerous flowers, in dense axillary clusters, with a green or purplish calyx, and a pale red-See also:purple corolla . It occurs in Europe, North Africa and West Asia, and in Britain See also:south of the Forth and See also:Clyde, and has been introduced into North America .

End of Article: HOREHOUND (0. Eng. harhune, Ger. Andorn, Fr. marrube)
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