﻿Phytogeographical notes 



Northern Rockies 

 Stipa Richardsonii Elymus innovatus 



" Lettermannii ^Agropyron latiglume 



Poa Cusickii " spicatum 



" nevadensis 



5. Hog-backs and Dry Ridges 

 The flora here consists mostly of grasses from the Great Plains 

 intermixed with some elements from the Subalpine Zone. The 

 grass flora is rather poor in number of species. This is especially 

 the case if those common to the hillsides are eliminated. The 

 flora includes the following grasses: 



*Aristida longiseta Poa crocata 



* " Fendleriana f " paddensis 

 Stipa viridula ^Festuca brachyphylla 



* Calamagrostis purpurascens f " saximontana 

 Avena americana ^Agropyron andinum 

 Danthonia intermedia f " Scribneri 

 Boutelouu oligostachya " spicatum 



*Koeleria gracilis 



The following are restricted to one region : 

 Southern Rockies Northern Rockies 



Stipa Vaseyi ^Poa Cusickii 



■\Muhlenbergia subalpina *Festuca campestris 



filiculmis \Sitanion rigidum 



Poa Fendleriana " lanceolatum 



To the preceding formations may be added the following five 

 in which the grasses do not constitute the principal or predominant 



6. Woods 

 The truly wood species of grasses are very few, and even 

 these do not grow in the deep forest but in more open places. 

 They are the following: 

 Oryzopsis asperifolia Poa compressa 



Cinna latifolia Festuca Jonesii 



Avena striata 



