Rydberg: Phytogeographical notes 469 



Northern 



Salix Dodgeana Micranthes Vreelandii 



Alsinopsis quadrivalvis Leptasea Hir cuius 



Alsinopsis Rossii Leptasea Van Bruntiae 



Alsine polygonoides Polemonium parviflorum 



Chrysosplenium tetrandrum- Chondrophylla Fremontii 



Muscaria monticola Artemisia spithamaea 

 Micranthes crenatifolia 



5. Alpine meadows 



The more or less mesophytic part of the alpine region may be 

 called the alpine meadow. It is found in the less sloping parts of 

 the mountains, where more humus and alluvial soil has had a 

 chance to collect. Of course, the more characteristic plants in 

 such localities are grasses and sedges. 



The most important and most common of the grasses are the 

 different species of Poa, Phlenm alpinum, Trisetum subspicatnm, 

 Agropyrum biflorum, Festuca saximontana, and in the wetter 

 places, especially on brook banks, Deschampsia caespitosa and D. 

 alpicola. On the slopes Festuca ingrata and F. Thurberi are also 

 important, but not to such an extent as they are in the subalpine 

 and mountain region. The sedges and rushes occupy mostly the 

 wetter parts, which stand on the borderland of bogs. There are, 

 however, localities which must be classified as meadows, where 

 the predominating plants are other than grasses and sedges. In 

 many places many acres are covered wich mostly Acomastylis 

 turbinata or Rydbergia grandiflora in the southern, and Acomastylis 

 sericea in the northern Rockies. 



The common species of the meadow formations throughout 

 the whole region are the following: 



Phleum alpinum *Poa epilis 



Deschampsia caespitosa Poa leptocoma 



Trisetum subspicatum *Festuca ingrata 



Trisetum majus Festuca saximontana 

 *Danthonia intermedia Festuracubra 



*Poa longiligula *Agropyron caninum 



*Poa Buckleyana Agropyron biflorum 



