474 RYDBERG: PHY 
Southern Rockies 
Sparganium angustifolium 
*Potamogeton alpinus 
* Utricularia vulgaris 
Callitriche palustris 
Isoetes paupercula 
APHICAL NOTES 
Northern Rockies 
Sparganium angustifolium 
Sparganium minimum 
Potamogeton alpinus 
Callitriche palustris 
Tsoetes Bolandert 
In the alpine brooks are found Catabrosa aquatica and Phippsia 
algida, the latter having been collected at one locality in Colorado. 
New York BoTanicaAL GARDEN 
4 
4 
a 
| eee 
