AGROSTIDEAE 63 



(Orysopsis micrantha) and resembles the preceding pretty 

 closely, but is much smaller and more delicate and the "seed" 

 is not silky. It seems to prefer a rather shaded location and 

 is often seen growing among rocks in the mountains. It is 

 never very abundant in any location but is apt to be met in 

 the lower parts of the mountains almost any place in the State, 

 It is relished by stock and adds its small contribution to the' 

 forage crop. The other species of this genus is rare in the 

 mountains, and of little importance. 



24. ERIOCOWIA Nutt. 



Eriocoma CUSpidata Nutt. Occurs on sandy soils at the lower 

 levels throughout the State in the Sonoran Zones. 



25. ORYZOPSIS Michx. 



Leaves slender and inrolled from the edges; 



spikelet small, 2-4 mm. long. 1. O. micrantha. 



Leaves broader, often flat; spikelets 6-8 mm. 



long, 2. O. asperifolia. 



1. Oryzopsis micrantha (Trm and Rupr.) Occurs in the 

 lower mountains under pinon trees or among rocks, in the Upper 

 Sonoran Zone, ranging upward. 



2. Oryzopsis asperifolia Michx, A rare grass found in the 

 mountains at middle elevations in the Transition Zone. 



