246 



DISTRIBUTION OF PLANT COMMUNITIES 



stems for each one that burned. This results in a growth that is so 

 dense that it is practically impenetrable to man and other large 

 animals. 



Fig. '[\Q.—Adenosloma fasciculatum. A common plant of the chaparral of 

 Southern California. (Photograph by W. S. Cooper.) 



146. Woodland Communities.— The woodland formation, like 

 the chaparral, is intermediate between forest and grassland or, in 

 some places, between forest and desert. In some places, especially 

 in north central Ai'izona, it has encroached upon former xeric grass- 

 lands where the grasses have been depleted by overgrazing. The 

 woodland is typically southwestern in its distribution. It is found on 

 the lower slopes of the Chisos, Davis, and Guadalupe IMountains 

 of southwestern Texas and covers extensive areas in New Mexico, 

 Colorado, Utah (Fig. Ill), Ai'izona, Nevada, and California. It 

 consists of small trees, usually between 10 and 40 feet high, belong- 



