16 



GEOGRAPHICAL DISTRIBUTION 



VI. The Temperate Regions in Austral America. 



In tlie absence of well-marked seasons, nowhere exposed to severe 

 cold; the temperature decreasing gradually and regularly in receding 

 from the Tropic. Eight botanical regions may be distinguished. 

 Colored grey in the accompanying map. 



77. The Mountain Region on the Western Slope of the Peru- 

 vian Andes. From the elevation of about five thousand feet to that 

 of ten thousand; at least, in S. latitude 12°. A clearer sky than in 

 Lower Peru, with occasional rains; but these are insufficient in quan- 

 tity for the growth of a regular forest. Remarkable for the abundance 

 and variety of Calceolarias and Solanaceoe. 



78. The Mountain Region on the Western Slope of the Bolivian 

 Andes. 



79. The Mountain Region on the Eastern Slope of the Peruvian 

 Andes. Exposed to more frequent rains than the two preceding 

 regions, but said to be destitute of a continuous forest, and of large 

 trees. The region of Cinclionas and of Epidendric Orcliidacece. 



80. The Mountain Region on the Eastern Slope of the Bolivian 

 Andes. Probably more arid than the last-named region. 



81. The Pampas or Unwooded Plains of Buenos Ayres and the 

 Lower Parana. In coming from the country to the Southward, 

 found by Darwin to be decidedly "green and grassy." 



82. The Arid Plains of Patagonia. From S. latitude 39° to the 

 Straits of Magellan. Hardly a true Desert, as the surface everywhere 

 presents a scattered vegetable growth, adapted to the extreme aridity. 



83. The Region of Lower Chili. Principally unwooded ; present- 

 ing thickets, and shrubs more or less arborescent, but few or no large 

 forest-trees. 



84. The Island of Juan Fernandez. Clearly a distinct botanical 

 region ; though situated at no great distance from the Chilian coast. 



VII. The Temperate Regions on and around New Zealand. 



Not exposed to severe cold ; the climate uniform and insular, devoid 

 of well-marked seasons. Five botanical regions may be distinguished. 

 Colored grey in the accompanying map. 



