December 12, 1994 



MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: ASTRAGALUS GEYERI 

 Common Name : GEYER MILKVETCH 



Global rank ; 

 State rank: 



Forest Service status : 

 Federal Status: 



Element occurrence code: 

 Element occurrence type: 



PDFAB0F3M0.001 



Survey site name 



EO rank 



EO rank comments 



HELL CREEK 



BC 



POPULATION SIZE DROPS LOW AND HABITAT IS SUBJECT 



TO WEED ENCROACHMENT. 



County: GARFIELD 



USGS quadrangle: MALONEY HILL 



Township: Range: Section: TRS comments: 

 022N 038E 31 N2SW4 



Precision 



Survey date 



First observation 



Last observation 



1993-06-20 Elevation: 2400 

 1978-06-10 Slope/aspect: 20-35% / S- 

 1993-06-20 Size (acres) : 



Location: 



NORTHWEST OF MAIN CAMPGROUND AND STORAGE ENCLOSURE, HELL CREEK STATE 

 PARK. (FORT PECK LAKE.) 



Figment occurrence data : 



1993: 3 COLONIES OF 50-80 PLANTS TOTAL FOUND, SCATTERED IN LOW NUMBERS 

 ACROSS 0.2 5 MILE OF OUTCROPS. 19 92: 6 PLANTS ON RIDGE TO WEST; 50-100 

 PLANTS WIDELY SCATTERED ON RIDGE TO EAST. IN FRUIT. 1978: LARGE 

 COLONIES . 



General site description: 



CONSPICUOUS SANDSTONE OUTCROP RIDGE TOPS, AMONG SEVERAL RIDGES. LOOSE, 

 STEEP SAND SLOPES BELOW SANDSTONE OUTCROPS, WITH MUCH SANDSTONE 

 RUBBLE. SPECIES OCCURS ON THE MOST UNSTABLE, SPARSELY-VEGETATED 

 HABITAT AVAILABLE. TWO SEPARATE RIDGES, ON LOOSE SAND BELOW LARGE 

 OUTCROP FACES. IN HABITAT DOMINATED BY CALAMOVILFA LONGIFOLIA ON BARE 

 SAND LOCATED USUALLY LOWER ON SLOPE THAN LUPINUS PUSILLUS, PSORALES 

 LANCEOLATA AND SOMETIMES ASTRAGALUS KENTROPHYTA . THE WEST RIDGE IS 

 INVADED -Vi WEEDY SPP : MELILOTUS OFFICINALIS, HELIANTHUS PETIOLARIS, 

 SALSOLA KALI . WITH ORYZOPSIS HYMENOIDES . 



Land ovmer/manager : 



CHARLES M. RUSSELL NATIONAL WILDLIFE REFUGE 



Comments : 



THE AREA REFERRED TO AS CAMPING MEADOW BY LACKSCHEWITZ AND AS TRAILER 

 PARK ON TOPO MAP IS NO LONGER USED FOR CAMPING. SANDSTONE OUTCROPS IN 

 VICINITY OF ALL PAST AND PRESENT CAMPING AREAS WHERE CHECKED. SPECIES 

 APPEARS TO BE A POOR COMPETITOR WITH OTHER NITROGEN- FIXING PLANTS IN 



