PERUVIAN BARK. 



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extremities of the branches, and of a white or rose colour. Fig. 11 

 represents a branch of the C Condcuminea. 



Fig. 11. 



There are only three varieties of genuine Peruvian bark recog- 

 nised by the pharmacopceias ; these are the pale^ the yellmv, and 

 the red. 



Pale Bark. {Cindiona pallida.) — Called also Loxa or Crown 

 bark, and by the French, gray bark. It includes the commercial 

 varieties of Loxa and Lima barks ; and is the product of the C. 

 Condaminea, and the C. micrardha. Jt comes only in quills, which 

 are from half a foot to a foot long, from two lines to an inch in 

 diameter ; the epidermis is marked by numerous transverse cracks ; 

 colour of epidermis, gray, though often diversified ; internal colour, 

 cinnamon ; fracture, smooth ; colour of powder, lighter than the 

 others ; taste, bitter and astringent. 



Yellow Bark {Cinchona flav a). — Called also royal yelloio and Ca- 

 lisaya bark. The species which yields it, is not certainly known. It 

 comes in quills and flat pieces ; the former are from three inches to 

 a foot in length, and from a quarter of an inch to two inches in 

 diameter ; epidermis, brownish, marked by longitudinal wrinkles and 



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