General therapeutics and materia medica (volume 1): adapted for a medical text book . in the hollows, owing to adhering lichens. x CINCHONA. 77 The inner surface is of a deep cinnamon brown, inclining to reddishbrown ; and the colour of the powder is so much redder than that ofthe preceding varieties as to render the epithet red bark taste is bitter, somewhat aromatic, and astringent. The quilled variety is a species of about the same size as quilled yel-low bark. These are of a paler reddish brown externally than the flatpieces, and internally of a clearer cinnamon brown colou
General therapeutics and materia medica (volume 1): adapted for a medical text book . in the hollows, owing to adhering lichens. x CINCHONA. 77 The inner surface is of a deep cinnamon brown, inclining to reddishbrown ; and the colour of the powder is so much redder than that ofthe preceding varieties as to render the epithet red bark taste is bitter, somewhat aromatic, and astringent. The quilled variety is a species of about the same size as quilled yel-low bark. These are of a paler reddish brown externally than the flatpieces, and internally of a clearer cinnamon brown colour, approachingthat of yellow bark. On the epidermis are frequent patches of palegray efflorescence from lichens. The colour of red bark in general isfaint reddish brown, and the odour is feebly tan-like. It is distin-guished from the varieties already considered by containing both quiniaand cinchonia in considerable quantities. This fact ought to cause it tobe more largely used ; yet in Europe it is so little employed that it re-ceives scarcely any attention. (Pereira.) Fig. Cinchona Micrantha, Such are the varieties of cinchona that are officinal in the Pharmaco-poeia of the United States. There are many other varieties, however,which are genuine cinchona barks ; and yet have not been consideredworthy of an officinal position. The Edinburgh Pharmacopoeia admits, 78 SPECIAL TONICS. indeed, Cinchona cinerea, Gray Bark, Silver Bark, or Huanuco Bark,which is obtained around Huanuco, in Peru, and belongs to the class ofpale barks. Amongst the genuine, but inferior barks, are the Cartha-gena Barks, which are brought from the northern Atlantic ports ofSouth America: the characters of these, and, indeed, of all the cin-chonas, have been well and fully described by Dr. Pereira. It was to be expected, that so valuable a bark as genuine cin-chona should be subject to adulteration. The most important spuriousbarks are the Piton or St. Lucie Bark, from Exostemma Jloribundumof the Wes
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