THE NORTH TEMPERATE ZONK 



151 



In this region is found the remarkable California]] pitcher 



plant (Darlingtonia Calijornica), reminding one of the tall Sar- 

 racenias of the Gulf states. A number of orchids, Cypripedium, 

 Epipactis, Cephalanthera and others are also characteristic of 



A B 



Fig. 45. — A. Californian pitcher plant (Darlingtonia Calif orniea), Shasta region, 

 California; B. Giant saxifrage (Saxifraga peltata), Upper Sacramento River; 

 Azalea in background. 



this region. In general the Californian flora is not rich in orchids. 

 Many boreal plants, e. g., Linnaea, Clintonia, Pyrola, etc., are 

 common in the woods of this district. 



The Colorado Desert 



Southeastern California and southern Arizona, the regions 

 adjacent to the Colorado River, are very arid, much of the country 

 being a true desert. Part of this region, like the Imperial valley, i 

 below sea-level, and a region of intense summer heat . The less 



