FESTUCEAE 139 



9. Poa aperta Seribn. Like the last in distribution; on 

 high nioniitiiitis in the ('anadiaii and Hiidsonian Zones. 



10. Poa interior Rydberg. Found on rocky ledges near 

 timber '.'a-.l i.. ihc ihidsnniaii 7a>v.p and lower in cold wet meadows. 



il. Poa laevigata Scribn. in cool wet meadows in the 



mountains: in the Tiaiisition Zotic; not common. 



12. Poa lUCida \asey. In similar situations to the last. 



13. Poa longiiigula Scrihn. and Williams. Known in New 

 Mexico from two co lections tsear Aztec; probably an Upper Son- 

 oran species. 



14. Poa longipedunculata Scribn. In the Transition Zone 

 in the mountains of ilic northern jiart of the State. 



15. Poa brevipaniculata Scribn. and Wilcox. Known in 

 New Mexico from near La> Vegas on dry hillsides in the Upper So- 

 noran Zone. 



16. Poa arida Vasey. Very similar to the next and in sim- 

 ilar though possibly drier situations and extending downward into 

 the Lower Sonoran Zone. 



17. Poa fendleriana (Steud.) Vasey. Mutton Grass. A 



grass mucli prized by sheep men fairly common in the drier parts of 

 the mountains throughout the State; in the Upper Sonoran Zone. 



65. PANICULARIA Fabr. Maxxa C.r.vss 



Spikelets small, 3 mm. long or less; branches of 



the panicle weak and drooping. 1 /'. iitrvcita. 



Spikelets larger 4 to 6 mm. long; branches of 



the panicle ascending or spreading. -. /". oinericana. 



1. Panlcuiaria nervata iWilld.) Kuntze. A fairiy com- 

 mon grass of the cooler timbered areas in the mountains: in the 

 Transition Zone extending into the Canadian. 



2. Panicularia amerlcana (Torr.) MacM. A coarse 



grass growing in wet soil beside streams and springs mostly in the 

 Upper Sonoran Zone. 



