474 



Rydberg: Phytogeographical notes 



Southern Rockies 



Sparganium an gusti folium 

 *Potamogeton alpinus 

 * Utricularia vulgaris 



Callitriche palustris 



Isoetes paupercnla 



Northern Rockies 



Sparganium angustifolium 

 Sparganium minimum 

 Potamogeton alpinus 

 Callitriche palustris 

 Isoetes Bolanderi 



In the alpine brooks are found Catabrosa aquatica and Phippsia 

 algida, the latter having been collected at one locality in Colorado. 



New York Botanical Garden 



