14ti TREES AND SHRUBS 



percentage of rubber, but not in sufficient quantity to make 

 the extraction profitable. 



Arrow Wood or Cachinilla (Berthcllotia borrealis) is 

 a common shrub, forming large patches in the valleys of the 

 southern part of the State. It is of no economic importance, 

 but probably receives its American name from the use of its 

 stems by the Indians. 



A small branching undershrub that occurs among the 

 rocks in the foothills of the hotter mountains is Carphochaete 

 bigllovii. This little shrub is a profuse bloomer and a free 

 grower. While not more than 18 inches high, it would be a 

 very satisfactory little bedding plant. 



Boneset (Eupatorium sppj is represented by one or two 

 shrubby species which might be brought into cultivation. 



The Wild Zinnia fCrassina puniula) is a low undershrub 

 8 or 10 inches high and widely branched. It produces an 

 factory in a desert garden. 



ly dry on the plant. For a border plant it would be very satis- 

 abundance of white flowers, the ray flowers of which ultimate- 

 more or 'ess distinct vortical ranks, mostly destitute of herbaceous 



