by the U.S. Fish and Wildlife Service (USDI-FWS 1993). Many 

 areas of the Beartooth Mountains have been explored botanically ; 

 nonetheless, K^ macrocarpa , S. barrattiana , Senecio amplectens 

 and Eriophorum callitrix have been found only on the Line Creek 

 Plateau or the adjacent Hellroaring Plateau. The earlier snow- 

 release occurring on the Line Creek Plateau may provide 

 conditions more amenable to species that evolved in low-elevation 

 arctic environments such as Kobresia macrocarpa and Eriophorum 

 callitrix . These observations suggest ways in which this 

 easternmost and warmest plateau may be biologically unique. 



AGOSERIS LACKSCHEWITZII Hend.S Mos. (Pink agoseris) [G3/S2S3] 

 Geographic Range : Western Montana, adjacent Wyoming and east- 

 central Idaho. 



Habitat : Moist to wet meadows in the upper montane to subalpine 

 zones. 



Occurrence : This newly-described species can be found in many of 

 the Montana mountain ranges east of the Continental Divide. In 

 the Beartooth Mountains it is currently known only from a single 

 moderate-size population on the Line Creek Plateau. 



CASTILLEJA LONGISPICA Nels . (White paintbrush) [G4/S1] 



Geographic Range : California and Nevada across eastern Oregon 



and central Idaho to western Montana and Wyoming. 



Habitat : Grasslands, meadows and sagebrush steppe in the valleys 



and montane zones. 



Occurrence : In Montana this species is known from the Sapphire, 



Pryor and Beartooth ranges. In the Beartooth area, the species 



is currently known from a single moderate-size population on the 



east side of the Line Creek Plateau. 



DRABA PORSILDII Mulligan (Porsild's draba) [G3/S1] 



Geographic Range : Alaska south to British Columbia and Alberta 



and disjunct in southern Montana and Wyoming. 



Habitat : Stony or gravelly soil among sparse vegetation, often 



on steep, cool slopes near or above timberline 



Occurrence : In the Continental U.S. this species is known only 



from the Beartooth and Wind River ranges. Montana populations 



are small. Two of three known locations in Montana are on the 



Line Creek Plateau. 



ERIGERON FLABELLIFOLIUS Rydb. (Fan-leaved daisy) [G3G4/S3] 

 Geographic Range : Southwest Montana and northwest Wyoming 

 Habitat : Barren gravelly soil or talus slopes near or above 

 timberline. 



Occurrence : In Montana this species occurs in the Beartooth, 

 Absaroka and Crazy mountain ranges. One population is known from 

 the north slope of the Line Creek Plateau. Much available 

 habitat occurs in relatively inaccessible areas of the Beartooth 

 Range, and the plant may be more common than is currently known. 



ERIOPHORUM CALLITRIX Cham. (Beautiful cottongrass) [G5/S1] 



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