MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: ASTRAGALUS SCAPHOIDES 

 (Common Name: BITTERROOT MILKVETCH 



Global rank: G3 Forest Service status: 

 State rank: SI Federal Status: 3C 



Element occurrence code: PDFAB0F7VO . 005 

 Element occurrence type : 



Survey site name: BACHELOR MOUNTAIN 



EO rank: B 

 EO rank comments: LARGE POPULATION, MANY VEGETATIVE PLANTS. 



County : BEAVERHEAD 



USGS quadrangle: BACHELOR MOUNTAIN 



Township: Range: Section: TRS comments: 

 009S 013W 14 N2 

 009S 013W 11 



Precision: S 



Survey date: 1984-06-09 Elevation: 6140 - 6840 



First observation: 1984 Slope/aspect: 5-20% / SW-SE 



Last observation: 1994-06-22 Size (acres): 60 



Location: 



FROM GRANT GO 2.2 MI. WEST; TURN NORTH AND GO 2.2 MI.; TURN WEST AND 

 GO 2.5 MI. TO FORK IN ROAD; SITE IS ALONG FENCE ABOVE ROAD. 



Element occurrence data: 



1984: CA. 100 PLANTS, BUT MANY SMALL AND NOT REPRODUCING. 1994: 1000+ 

 PLANTS IN 2-3 SUBPOPULATIONS . 30% FLOWERING, 7 0% VEGETATIVE AT UPPER 

 ELEVATION; PLANTS IN FRUIT AT LOWER ELEVATION. 



General site description: 



DRY MID AND LOWER SLOPES OF BACHELOR MOUNTAIN; STONY, TERTIARY 

 SEDIMENTS AND ALLUVIAL PARENT MATERIAL, LIGHT-TEXTURED SOILS. 

 ASSOCIATED SPECIES: CHRYSOTHAMNUS NAUSEOSUS, ARTEMESIA TRIDENTATA, 

 ELYMUS SPICATUS, CHRYSOTHAMNUS VISCIDIFLORUS, FESTUCA IDAHOENSIS, 

 ASTRAGALUS ADSURGENS, PENSTEMON ARIDUS, ARTEMESIA FRIGIDA, 

 LEPTODACTYLON PUNGENS . 



Land owner /manager : 



BLM: BUTTE DISTRICT, DILLON RESOURCE AREA 

 PRIVATELY OWNED LAND (INDIVIDUAL OR CORPORATE) 



Comments : 



DISTURBANCE BY CATTLE TRAILS AND GRAZING, MOSTLY CONFINED TO LOWER 

 SLOPES. ONE OF THE LARGER POPULATIONS OF THIS SPECIES SEEN IN THE 

 HORSE PRAIRIE AREA, COVERING DIVERSE HABITATS OVER BROAD ELEVATION. 



Information source: LESICA, P. 1984. REPORT ON THE CONSERVATION STATUS 



OF ASTRAGALUS SCAPHOIDES, A CANDIDATE THREATENED 

 SPECIES. UNPUBLISHED REPORT TO THE U.S. FISH AND 

 WILDLIFE SERVICE, DENVER, CO, 20 PP. PLUS 

 APPENDICES. 



Specimens: VANDERHORST, J. (5204). 1994. MONT. 

 LESICA, P. (2982). 1984. MONTU . 



