Present legal or other formal status 

 1. Federal 



A. U.S. Fish and Wildlife Service: none 



B. 



U.S. Forest Service: 



none 



Bureau of Land Management: none 



2. State: The state rank for this species was "SI" 

 indicating that it may be critically imperiled. It is now 

 known from six sites in three widely-scattered counties. This 

 study provides basis for changing its state rank to "S2" as a 

 state species of special concern. 



Geographical distribution 



1. Species range: Manitoba to 

 Alberta, south to Colorado, 

 South Dakota and Minnesota. 



2. Montana distribution: An 

 historic collection was made in 

 1889 from Choteau County, three 

 populations are now known from 

 Custer National Forest in 

 Carter County, and two 

 collections were also made of 

 this species recently in Big 

 Horn County. 



3 . Occurrence in the study 

 area: This species occurs on 

 the Ekalaka Hills and two 

 locations in the Long Pines. 

 It is not known from the South 

 Dakota units of the District. 



Habitat 



1. Associated Vegetation: Within the study area Carex 

 torreyi occurs on sheltered slopes within stands of Pinus 

 ponderosa . The trees generally range from 15 to 2 cm (6-7.9 

 in) dbh, and canopy coverage is from less than 20 to about 30 

 percent. Shrub cover ranges from 2 to 50 percent, and 

 consists mostly of low-growing species such as Mahonia repens , 

 Prunus virginiana saplings (less than 0.5 m tall), 

 Toxicodendron rydbergii . Graminoid cover is usually minute, 

 but in one case it is 70 percent. A variety of species 

 includes several species of Carex , Bromus ciliatus , Poa 

 pratensis, and Stipa nelsonii . Forbs range from 1 to 20 



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