FLORISTIC REGIONS 101 



Moric.) passes into th? " M.e/qri 1 "'" of 'spiheus Acacias 

 (Prosopis), forming, with other thorny shrubs, what 

 is known as " Chapparal," much the same as the 

 "maquis " of the Mediterranean. Indicative apparently 

 of the former extension of a warmer climate northward, 

 Agave, Yucca, and Cacti abound from Arizona and 

 Texas into Mexico, the " Highland " region of the latter 



FIG. 8. Rheum nobile Hook, fil., from steppes of Sikkim, 



in Edinburgh Botanical Garden. 

 



country, above 5000 feet, being, in fact, a mere southward 

 extension of this region. 



The Calif ornian Region, west of the Rocky Mountains, 

 with but little difference in temperature between summer 

 and winter, and with no rain in the former season, much 

 resembles the Mediterranean. From the north, and in 

 higher ground, are the gigantic conifers, the Sequoias, 

 the loftiest species in the world, the Douglas Spruce 

 (Pseudotsuga Douglasii Carr.), and various Pines, re- 

 calling the Cedars of Lebanon and Atlas and the Corsican 

 and Aleppo Pines ; whilst evergreen broad-leaved trees, 



