Rydberg: Phytogeographical notes 



639 



Agropyron s pica turn 



" Richardsonii 



* " albicans 



Agropyron Gmelini 

 * " dasystachyum 



Sitanion montanum 



4. Mountain Slopes and Hillsides 



The mountain slopes in the Montane Zone resemble closely 

 those of the Subalpine Zone, but are more common and of greater 

 extent. The number of species is much larger. As stated under 

 the Subalpine Zone, the most important species in the Northern 

 Rockies is Festiica ingrata, and its place is taken on the southern 

 slopes of the Southern Rockies by F. arizonica and F. Thurberi. 

 The following species are represented in both the Northern and 

 the Southern Rockies: 



*Stipa viridtila 

 " Nelsonii 

 " nnnor 



" Vaseyi , 



Oryzopsis exigua 

 Agrostis liiemalis 

 \Trisetum subspicatiim 

 t ' ' majus 

 Poa longiligula 

 t " epilis 

 f " paddensis 

 " laevigata 



'\Festuca saximontana 



" 171 grata 



' ' confinis 

 XBromus Richardsonii 



" Pumpellianus 

 \ Agropyron andinum 

 X " violaceum 



* " tenerum 



*Sitanion elymoides 

 *Elymus canadensis 



The following are restricted to one region : 



Southern Rockies 



*Trichachne saccharatum 

 Stipa Scribneri 

 Muhlenhergia gracilis 

 * " siihalpina 



Melica Porteri 

 Poa aperta 

 ' ' macroclada 

 " Fendleriana 



Poa longipedunculata 



" Sheldonii 



%Festuca fratercula 



§ " arizonica 



§ " Thurberi 



Bromus lanatipes 



" Porteri 

 ^Sitanion molle 



