RYDBERG: PHy APHICAL NOTES 469 
Northern 
Salix Dodgeana Micranthes Vreelandii 
Alsinopsis quadrivalvis Leptasea Hirculus 
Alsinopsis Rossii Leptasea Van Bruntiae 
Alsine polygonoides Polemonium parviflorum 
Chrysosplenium tetrandrum Chondrophylla Fremontit 
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, Phleum alpinum, Trisetum subspicatum, 
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 with 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 Festuca rubra 
“Poa longiligula *A gropyron caninum 
*Poa Buckleyana Agropyron biflorum 
