62 AGROSTIDEAE 



5. Stipa editorum Fourn. Occurs with the preceding species 

 in the mountains of the southern part of the State; in the Upper 

 Sonoran Zone. 



6. Stipa pringlei Scribn. Known in New Mexico only from 

 the MogoUon Mountain region. 



7. Stipa minor (Vasey) Scribn. Occurs in the mountains 

 in the northern part of the State; in the Transition Zone. 



8. Stipa SCribneri Vasey. in the mountains at middle ele- 

 vations; not common. In the Transition Zone. 



9. Stipa vaseyi Scribn. Called Sleepy Grass in the 

 Sacramento and White Mountain region. Occurs in the mountains 

 of the northern and southeastern part of the State. Not known 

 from the Mogollon Mountain area. In the Transition Zone. 



10. Stipa Viridula Trin. Extending into New Mexico from 

 the north. Fairly common in the mountains of the northern end 

 of the State above middle elevations : in the Transition Zone. 



The immediate relatives of the Porcupine grasses are 

 three species which have much the same general appearance 

 but may be distinguished from them by the fact that the awn 

 is not twisted and breaks away from the "seed" when the latter 

 is ripe. Two of these are worthy of mention because they 

 occur rather widely scattered over the State and are hence apt 

 to be noticed by the observer and also because they add a little 

 to the forage crop, though not very much. 



The larger, Eriocoma cuspidata, (it has no common 

 name so far as we have been able to learn) is a spreading 

 bunch grass about 12 to 15 inches high, with widely spreading 

 panicles bearing nearly round "seeds" enveloped in a tuft of 

 silky hairs and having a short, untwisted awn. It usually occurs 

 on sand hills and would make a pretty good sand-binder, since 

 its roots are long and strong and penetrate deeply. It lis 

 a long-lived perennial and seems very well fitted to live on 

 the sandy dunes where so few other things can live. 



The other species is one of the rice-like grasses 



