THE CINCHONA BOTANICAL STATION 



33 



THE CINCHONA BOTANICAL STATION. II 



Br Pbofessoh DUNCAN S. JOHNSON, 



THE JOHNS HOPKINS UNIVERSITY 



The Native Vegetation op the Cinchona Eegion 



The native flora of Cinchona Hill is a varied and interesting one. 

 Being south of the mountains, and on a sharp ridge with perfect drain- 

 age, the soil often gets quite dry. Especially is this true of the small 

 pockets of humus in the rock clefts occupied by the numerous rock 

 xerophytes, and of that gathered on the limbs of trees or held among 

 the clustered roots of epiphytic orchids. AYe find here, therefore, many 

 species characteristic of these xerophytic habitats. There are century 

 plants, leathery-leafed terns, aroids, bromeliads, orchids and Peperomias 

 growing in the clefts of the rocks and on the branches of trees and 

 shrubs. Climbing or creeping ferns, aroids, orchids, milkweeds and 

 cacti run over the ledges and larger plants. On the branches of the 

 juniper and Dodonaea, of the thick-leafed Vaccinium, and even of the 

 nearl}^ leafless Bacchant on the dry hillsides, many species of leafy or 



Cliff with Xerophytic Plants. A century plant in its native home. 



VOL. LXXXVI. 3. 



