Arizona Agricultural Experiment Station 463 



Pistasch Tree (Pistacia vera) is a small, spreading, deciduous 

 tree also native of the Mediterranean region, which succeeds well 

 in southern Arizona valley soils. It bears the pistasch nuts of 

 commerce. Plants have been grown on the University grounds 

 and in the introduction garden at the University Farm for a period 

 of 12 years, during which time they have not been injured with 

 our usual summer temperature, nor with winter temperatures as 

 low as six degrees Fahrenheit. In the lime soils on the University 

 grounds the plants made poor growth, while in alkaline soil at the 

 University Farm their growth has been excellent. There are trees 

 of considerable size in the Government introduction garden at 

 Sacaton which have begun to bear nuts. 



Chinese Pistasch (Pistacia chinensis). This is quite a rapid-grow 

 ing tree, with deciduous leaves and stout twigs. It is a native of 

 China, and grows to a height of 40 or 50 feet. The leaves arc 

 smooth, glossy, and pinnate with six to ten pairs of leaflets, and 

 become deep red in autumn. This tree is very resistant to our 

 heat and has not been injured with temperatures as low as zero 

 «legrees F. It grows best in valley soils and tolerates considerable 

 alkali. 



