40 



TREES AND SHKUBS 



at least in the southern part of the State, from attacks of the 

 mistletoe. The tree grows fifty or sixty fet high under favor- 

 able conditions, forming a symmetrical rounded head with 

 gracefully arching branches and is effective for street use. 

 When grown alone and frequently pollarded, as is the too 

 common custom in the Mesilla valley, it is apt to become short 

 and bunchy. The author has seen it used very effectively 

 to produce a high arched open green canopy over a house which 

 was thus rendered most pleasantly cool in the warmest weather. 

 The tree may be recognized by its broadly triangular leaves, 

 which are nearly as broad as they are long. This species is 

 most effectively, used at Roswell and Carlsbad. Other cities 

 and towns should follow their example. 



Acumi.vate-Leaved CoTTON-wnon. Us.-d ns a Windbreak Around a Reservoir. 



Another cottonwood which is fully as effective and offers 

 a slightly denser shade is the acuminate leaved cottonwood, 

 (Populus acuminata), which has narrowly oval, taper-pointed, 



