17 



ii. Lewis & Clark National Forest, Rocky 

 Mountain Ranger District: 



Green Timber Basin (001) 



Beaver Creek (002) 



Sawmill Flat (003) 



Blacktail Gulch (006) 



Mortimer Gulch (007) 



Dry Fork Lange Creek (008) 



Leavitt Creek (009) 



Arsenic Creek (012) 



Clary Coulee (013) 



North Fork Birch Creek (014) 



Green Gulch (015) 



Falls Creek (South) (017) 



b. U.S. BUREAU OF LAND MANAGEMENT: 



i. Lewistown District, Great Falls Resource 

 Area : 



Willow Opening, Ear Mountain ONA (010) 



c. PRIVATE OWNERSHIP: 



Joslin Basin (Oil) 



Falls Creek (North) (016) 



II. ASSESSMENT AND MANAGEMENT RECOMMENDATIONS 



A. THREATS TO CURRENTLY KNOWN POPULATIONS (MONTANA) : 



Based on field observations in 1988, populations of 

 Orchis rotundifolia are potentially or currently 

 threatened by i) grazing, ii) recreational activities, 

 and iii) timber harvesting. The sites threatened by 

 these activities are reviewed below: 



1. GRAZING: The site that is currently being most 

 impacted by cattle grazing is Green Timber Basin 

 (001) , on the Lewis & Clark National Forest. 

 Cattle are turned into the area around 1 July each 

 year, and they concentrate in the basin area in 

 the old clear-cuts, as well as the forests in 

 which O. rotundifolia occurs. As discussed in 

 Section I.G.l.b., some impacts to the population 

 probably result from this activity. Cattle 

 grazing also occurs along the Beaver Creek 

 drainage (002) , and some subpopulations at this 

 site are impacted by stock movement along the road 

 (D. Field, pers. comm.). Although not observed in 

 June 1988, these impacts could also occur in the 

 adjacent, much larger Sawmill Flat (003) site. 

 Light cattle grazing was evident at the Leavitt 

 Creek (009) site. A grazing allotment may 



