﻿638 Rydberg: Phytogeographical notes 



belonging to the Staked Plains and the Upper Sonoran flora. 

 The species of Andropogon, Sporobolus, and Koeleria and the 

 stoloniferous species of Agropyron are immigrants from the Great 

 Plains, while those of Stipa (except 5. comata) and most species 

 of Bromus are endemic. The species of Poa and the bunched 

 species of Agropyron are divided between the two categories. 

 The following belong here: 



* Andropogon furcattis 



*Koeleria gracilis 



Hallii 



Festuca campestris 



*Stipa comata 



Bromus polyanthus 



" Tweedy i 



X " Richardsonii 



" viridula 



" Pumpellianus 



" Nelsonii 



XAgropyron violaceum 



^Mtthlenbergia Richardsonis 



* " tenerum 



*Sporoholus airoides 



* " pseudorepens 



* " asperif alius 



* " Smithii 



' " chryptandrus 



* " molle 



^Bouteloua oligostachya 



" spicatum 



Poa crocata 



*Hordeum jubatum 



" longiligula 



*Sitanion elymoides 



" laevigata 



Elymus triticoUes 



" confusa 



condensatus 



" " pratericola 



" simplex 



* " Buckley ana 





The following also belong here but are restricted : 

 Southern Rockies 

 Andropogon chrysocomus ^Festuca Thurberi 



%Blepharineuron tricholepis I Agropyron arizonicum 



Poalucida § " Bakeri 



Bromus Porteri 



Northern Rockies 

 Stipa Richardsonii Calamagrostis montanensis 



Williamsii Poa nevadensis 



Elmeri Bromus breviaristatus 



Muhlenbergia squarrosa " Flodmanii 



