EUCALYPTUS TREES, 28] 
Cinchona micrantha, Ruiz and Pavon.,—Cordilleras 
of Bolivia and Peru. This tree attains a height of 
60 feet, and from it part of the gray and Huanuco 
bark as well as Lima bark are obtained. It is com- 
paratively rich in cinchonin and quinidin; contains, 
however, also quinine. 
Cinchona nitida, Ruiz and Pavon.—Andes of Peru 
and Ecuador. This tree rises to 80 feet under favor- 
able circumstances. It also yields gray-bark and Hu- 
anuco-bark, besides Loxa-bark. It will probably prove 
one of the hardiest species. It contains predominant- 
ly cinchonin and quinidin. 
Cinchona officinalis, L. (partly)*. (Cinchona Can- 
daminea, Humboldt.)—Andes of New Granada and 
Peru, at a height of 6,000 to 10,000 feet. Yields crown 
or brown Peru-bark, besides part of Loxa-bark. Com- 
paratively rich in quinine and cinchonidin. The tem- 
perature of the middle regions of the Andes, where 
this tree grows, is almost the same as that of the Ca- 
nary Islands, Superabundance of moisture is particu- 
larly to this species pernicious, The crispilla variety 
endures a temperature occasionally as low as 27 de- 
grees F, 
Cinchona clancifolia mutis is considered by Wed- 
dell a variety of C. officinalis. This grows on places 
where the mean annual temperature is that of Rome, 
with however less extremes of heat and cold, It 
yields part of the Pitaya-bark. 
Cinchona Pitayensis must also be referred to C, 
officinalis as a variety. This attains a height of 60 
feet and furnishes also a portion of the Pitaya Bark, 
Jt is this particular Cipchona which, in Upper India, 
yielded in some instances the unprecedented quantity 
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