TREES AND SHRUBS 



55 



Live Oai 



scanty and uncertain. Like many of the desert shrubs and 

 trees, if once established they will probably endure extremes 

 of drought for long periods without dying. Two trees closely 

 outline, that occur in the mouths of canyons and along arroyos 

 in the foothills of the drier and hotter mountains. They are 

 extremely slow growers and ordinarily quite scraggy in form. 

 Occasionally under favorable conditions of water supply these 

 trees become 30 or 40 feet high. Ordinarily they are from 

 10 to 20 feet, and the trunk is short, often branched from near 

 the ground. Cattle appreciate their shade, and they generally 

 show the effects of such use. Attempts to transplant and grow 

 these trees at the Experiment Station have not been successful, 

 but the author believes they can be used effectively in certain 

 situations where shrubbery is desired and the water supply is 

 related to this last mentioned, but which occur quite sparingly 

 and only in the southwestern corner of the State, are Ouercus 

 wttcoxii and Q. reticulata. 



