Introduction 



A survey of the East, Main and West Boulder River drainages, 

 and selected areas of the Gallatin National Forest for Claytonia 

 lanceolata var. flava, was completed during the week of June 3-7, 

 1991. This short report briefly outlines population information 

 that will be contained in a final full report, due December 31, 

 1991. 



East Boulder River Drainage 



Numerous large populations and subpopulations of Claytonia 

 lanceolata var. flava were located on Forest Service and private 

 lands. These populations were located both above and below the 

 proposed tailings ponds within the drainage. Populations located 

 within this drainage are outlined in Figures 1 and 2. As the map 

 indicates, there are tens of thousands of plants in several 

 populations. The legal descriptions for these occurrences are as 

 follows: 



T3S R13E Section 29, SW^ - 100-200 plants. 



T3S R13E Section 31, SE^ - Small population along stream, 

 20+ plants. 



T3S R13E Section 32, HVIk - Three subpopulations of 200, 50, 

 and 50 plants. 



T4S R13E Section 4, NW-^NE^s - Open meadow population, 1000 + 

 plants. 



T4S R13E Section 4, SE^NE^ - 10,000+ plants. 



T4S R13E Section 3, central - Four subpopulations with 

 10,000+, 1000+, 1000+, and 25 plants. 



T4S R13E Section 2, S^ and Section 11, N'i - Seven 

 subpopulations of 20, 1000+, 1000+, 5, 20, 10,000+, 100+, 

 and 3,000+ plants. 



T4S R13E Section 12, central - One population with 10,000+ 

 plants. 



The tailings ponds and affected area will impact four 

 subpopulations, two containing approximately 1000 plants each, 

 and two smaller subpopulations containing 5 and 50 plants 

 respectively. 



Main Boulder River Drainage 



The Main Boulder River drainage may at one time have 

 contained more habitat which supported populations of Claytonia 

 lanceolata var. flava . However, much of the native habitat of 



