RESULTS 



Six previously undocumented populations of five Montana 

 plant species of special concern were located on BLM land in the 

 study area. These taxa are Astragalus scaphoides (2 new 

 populations), Delphinium bicolor ssp. novum (1), Lesquerella sp. 

 novum I (1), Sphaeromeria argentea (1), and Sphaeromeria capitata 

 (1). The Lesquerella sp. novum and Sphaeromeria argentea were 

 not previously known from the study area. In addition, 

 previously known occurrences of Astragalus scaphoides and 

 Astragalus terminalis were relocated and new subpopulations of 

 each were documented for the first time. Three of the six known 

 occurrences of Penstemon lemhiensis were relocated but attempts 

 to find two others were unsuccessful; no new occurrences of this 

 species were found. Of these species, Astragalus scaphoides and 

 Penstemon lemhiensis currently have proposed BLM sensitive status 

 and Astragalus terminalis and Lesquerella sp. novum have proposed 

 watch status (USDI Bureau of Land Management 1993). A total of 

 17 populations of seven species of special concern are now known 

 from BLM land in the study area. These results are summarized in 

 Table 1, and Figures 1 and 2 are maps of the study area showing 

 the approximate locations of these populations. Element 

 Occurrence Records (EORs) and large scale (1:24,000) topographic 

 maps showing the precise locations are given for each population 

 in Appendix C. Photographic slides of the plants and their 

 habitats are attached at the end of this report. 



Table 1. Proposed BLM sensitive and watch plant taxa, and 

 Montana plant species of concern documented on BLM land in the 

 Horse Prairie Creek study area. 



