Table 3. (Con.) 



2. U, caespitosum and V. scoparium generally absent; if pres- 

 ent, they occur only as incidental species 3 



3. Juniperus communis conspicuous, generally with at least 5% 



canopy cover Populus tremuloides-Abies lasiocarpa/Juniperus 



communis c.t. (p. 33) 

 3. J. communis absent or occurring in only trace amounts 4 



4. Symphoricarpos oreophilus usually prominent, at least 10% 



cover; if scarce or absent, then Rubus parviflorus present in 



greater than trace amounts 7 



4. Not as above 5 



5. One or more members of the tall forb group, or Bromus 



carinatus and/or Elymus glaucus. a conspicuous part of the her- 

 baceous layer Populus tremuloides-Abies lasiocarpa/Senecio 



serra c.t. (p. 33) 



5. Not as above; these species either absent or occur only 



incidentally 6 



6. Carex geyeri. Carex rossii, Carex obtusata. Stipa 



occidentalis. or Astragalus miser (alone or in combination) 



conspicuous, usually with at least 5% canopy cover Populus tremuloides-Abies lasiocarpa/Carex 



geyeri c.t. (p. 35 ) 



6. Not as above Unclassified type 



7. One or more members of the tall forb group, or Bromus 



carinatus and/or Elymus glaucus. a conspicuous part of the her- 

 baceous layer Populus tremuloides-Abies lasiocarpa/ 



Symphoricarpos oreophilus/Senecio serra c.t. 



(p. 31) 



7. Not as above 8 



8. Carex geyeri, Carex rossii. Stipa occidentalis. or Astragalus 

 miser (alone or in combination) conspicuous, usually with 



at least 5% canopy cover Populus tremuloides-Abies lasiocarpa/ 



Symphoricarpos oreophilus/Carex geyeri c.t. 

 (p. 32) 



8. Not as above Unclassified type 



(Populus tremuloides-Abies concolor cover type) 



1. Both Symphoricarpos oreophilus conspicuous (at least 5% 

 cover), and one or more members of the tall forb group or Bro- 

 mus carinatus and/or Elymus glaucus a conspicuous part of the 



herbaceous layer Populus tremuloides-Abies concolor/ 



Symphoricarpos oreophilus c.t. ip. 36) 

 1. Not as above 2 



2. Juniperus communis present; members of the tall forb 

 group, Bromus carinatus. and Elymus glaucus absent or 



merely incidental Populus tremuloides-Abies concolor/Juniperus 



communis c.t. (p. 36 ) 

 2. Not as above Unclassified type 



{Populus tremuloides-Pseudotsuga menziesii cover type) 



1. Amelanchier ainifolia. Prunus virginiana. or Acer grandidentatum 

 (alone or in combination) present and usually abundant; 



Juniperus communis absent Populus tremuloides-Pseudotsuga menziesii/ 



Amelanchier ainifolia c.t. (p. 37) 

 1. Not as above 2 



2. Juniperus communis present and usually abundant Populus tremuloides-Pseudotsuga menziesii/ 



Juniperus communis c.t. ;p. 37) 

 2. J. communis absent Unclassified type 



{Populus tremuloides-Pinus ponderosa cover type) 



1. Quercus gambelii. Prunus virginiana. or Acer grandidentatum 

 (alone or in combination) abundant, usually exceeding 10% 



canopy cover Populus tremuloides-Pinus ponderosa/Quercus 



gambelii c.t. (p. 38) 

 1. Above shrubs absent, or present in only incidental amounts ... 2 



2. Juniperus communis present, usually accompanied by 



SItanion hystrix. Stipa comata. or Carex rossii Populus tremuloides-Pinus ponderosa/Juniperus 



communis c.t. (p. 38) ^^^^ ^ 



12 



