C. GEOGRAPHICAL DISTRIBUTION 



1. GLOBAL RANGE: Ontario to British Columbia, south tliroughout most of 

 the United States and northern Mexico. 



2. STATE DISTRIBUTION: In Montana, this species is known from five 

 collections, including tliree collections on the Ashland District in Powder River 

 County, and two collections made over 30 years ago from Lake County (Figure 

 12). Based on its presence in adjoining states, it could potentially occur in 

 much of Montana, but this is not corroborated by collection data. 



3. STUDY AREA DISTRIBUTION: Two new sites were documented in the 

 course of this study, and we failed to relocate the historic collection near 

 Bloom Creek (Figure 12). The two new sites are in the northern end of the 

 district near the upper ends of draws coming off of the divide between Beaver 

 Creek and the East Fork of Otter Creek. 



HABITAT 



ASSOCIATED VEGETATION: The two new occurrences were in Pinus 

 ponderosa/Mahonia repens habitat type (Figure E-10). Both of the Lake 

 County specimens were similarly collected in sandy pinelands. Associated 

 species are: 



AgTopyron spicatum 

 Astragalus agrestis 

 Astragalus americanus 

 Carex deweyana 

 Carex sprengelii 

 Crepis acuminata 

 Elymus glaucus 

 Euphorbia glyptosperma 

 Mahonia repens 

 Panicum scribnerianum 

 Penstemon gracilis 

 Pinus ponderosa 

 Poa pratensis 



TOPOGRAPHY: Both populations were situated at the upper end of draws. 

 The East Fork of Otter Creek occurrence (003) was situated in the bottom of a 

 steep wooded draw on the lower south-facing slope. The Cabin Creek 

 occurrence (002) was located at the gently-sloping upper end near the border 

 between woodland and grassland. 



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