42 



Lomatium attenuatwn 

 Mimulus suksdorfii 

 Penstemon aridus 

 Petrophytum cespitosum 

 Phlox bryoides 

 Pinus flexilis 

 Poa secimda 

 Pseudotsuga menziesii 

 Senecio canus 

 Sphaeromeria argentea 

 Townsendia mittaUii 



The preference of this species for low-competition settings was evident in the study area by its 

 sporadic colonization of a gravelly open stream bed in low numbers below the BLM population 

 near Bannack. 



It was also found on an abandoned two-track road at a point over limestone bedrock leading to 

 the Ermont Mill and No. 2 Mine. This was located close to a well-established "natural" 

 population and was made up of comparatively few plants. In its natural setting, the habitat is 

 subject to frost heaving. Wliile there is also rodent burrowing activity in the area, the species 

 does not usually occur in these disturbed mounds. 



In the Centennial Mountains and upper elevations of the Pioneer Mountains Lesquerella 

 pulchella, has been documented in parkland and open ridge top settings, where a preliminary list 

 of associated species includes: 



Abies lasiocarpa 

 Carex geyeri 

 Carex rossii 

 Dryas octopetala 

 Ehtrichium naman 

 Geum rossii 



Hedysarum siiphurescens 

 Lesquerella alpina 

 Lloydia serotina 

 Picea engelmanii 

 Pinus albicaulis 

 Poa alpina 



Pseudotsuga menziesii 

 Silene acaulis 

 Valeriana dioica 



POPULATION INFORMATION: Population numbers in the study area range from <100 to 

 >5000. All of the largest populations of this species >1000 plants are on BLM lands, and tliree 



