74 AGROSTIDEAE 



5. Muhlenbergia racemosa (Mchx.) B. S. P. Rather com- 

 mon in the mountains at middle elevations: in the Transition Zone 

 and downward into the Upper Sonoran. It superficial!)' resembles 

 the preceding as well as the next more or less. 



6. Muhlenbergia comata (Thurb.) Benth. Known from a 

 single locality in the mountains on the headwaters of the Pecos. It 

 probably is more abundant but this is the only recorded collection 

 in New Mexico. A more northern species. 



7. Muhlenbergia richardsonis (Trin.) Rydb. In the moun- 

 tains of the more northerly part of the State: in the Transition 

 Zone. 



8. Muhlenbergia wrightii Vasey. In the mountains at 

 middle elevations: in the Transition Zone. 



9. Muhlenbergia CUSpidata (Torr.) Rydb. In the moun- 

 tains at middle elevations : in the Upper Sonoran and Transition 

 Zones. 



10. Muhlenbergia thurberl Rydb. The type locality is on 

 the plains in the eastern part of the State at Plaza Larga. Only 

 certainly known in New Mexico from this collection. 



11. Muhlenbergia utilits (Torr.) Rydb. Aparejo Grass. 



At the lower levels in the southern part of the State; in the Sonoran 

 Zones. 



12. Muhlenbergia gracilis Trin. In the mountains at middle 

 elevations; in the Transition Zone. 



13. Muhlenbergia virescens (H. B. K.) Trin. Known in 

 New Mexico from two collection from the mountains of the west- 

 em part of the State; in the Transition Zone. 



14. Muhlenbergia affinis Trin. In the drier mountains of 

 the southwestern part of the State : in the Upper Sonoran Zone. 



15. Muhlenbergia acuminata Vasey. With the preceding; 

 in the Upper Sonoran Zone, in the southwestern part of the State. 



16. Muhlenbergia monticola Buckl. In the drier parts of 

 the mountains almost throughout the State. Mostly in the Upper 

 Sonoran Zone. 



