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GENERAL REVIEW. 



of C. sucrirubra with the lovely purple tints and velvety appear- 

 ance characteristic of the " Grey Barks." On analysis, its bark 

 which was lighter in colour than that of C. succirubra 

 yielded 1.45 per cent of nearly pure cinchonine, instead of about 

 3.00 per cent of alkaloid mainly consisting of quinine and 

 cinch onidine, as in C. succirubra of the same age. This plant 

 was picked up under a tree of C. micrantha as a natural seed- 

 ling, while close by were trees of C. sucrirubra, which flower at 

 the same time. Another supposed hybrid variety was found 



Fruiting branch and flowers of Cinchona Calisaya. 



intermediate between the last-named species and C. offirinalis. 

 Other varieties are appearing among the seedling trees, and 

 these are either hybrids or cases of extreme seminal variation, 

 some twenty of them being quite distinct from the earlier intro- 

 duced kinds. Some of the Indian plantations were stocked by 

 plants raised on the spot from imported seeds ; and bearing in 

 mind the dimorphic character of the flowers, it is possible the 

 seeds of these might have been cross-fertilised with pollen from 

 other allied forms in their native woods. The different species 



