﻿Rydberg: Phytogeographical notes 



sides of the Northern Rockies. The grass flora of the i 

 sides is of the following composition : 



Stipa minor 



Festuca ingrata 



*= " Nelsonii 



t " saximontana 



AgrosHs hiemalis 



Bromus Richardsonii 



Trisetum suhspicatum 



Pumpellianus 



majus 



Agropyron andinum 



Poa longiligula 



Scribneri 



" paddensis 



violaceum 



" epilis 





" laevigata 



The following are restricted to one region: 

 Southern Rockies 

 Muhlenbergia gracilis Poa Fendleriana 



suhalpina " Sheldonii 



Poa aperta Bromus Porteri 



" longipedunculata 



Northern Rockies 

 *Poa Cusickii ^Agropyron latiglume 



" nevadensis 



Southern slope of the Southern Rockies 

 On the more xerophytic southern slopes of the Rockies of 

 Colorado and New Mexico, the following species are the char- 



Trichachne saccharatum Festuca i 



Poa crocata " Thurberi 



" Fendleriana f " saximontana 



5. Hog-backs 

 As stated before, the grass flora of the hog-backs or exposed 

 ridges is practically the same as that of the rock-crests of the 

 alpine region, except that a few of the more mesophytic grasses, 

 as for instance Trisetum subspicatum and Deschampsia curtifolia, 

 are lacking. A few species from the Montane Zone are added. 



