April 17, 1996 



MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: ASTRAGALUS BARRII 

 Common Name: BARR'S MILKVETCH 



Global rank: G3 Forest Service status: SENSITIVE 

 State rank: S3 Federal Status: 



Element occurrence code: PDFAB0F150. 013 

 Element occurrence type: 



Survey site name: STAG ROCK CLIFF TOPS 



EO rank: BC 

 EG rank comments: GOOD-SIZED POPULATION; NOT FLOWERING EXTENSIVELY. 



County: POWDER RIVER 



USGS quadrangle: FORT HOWES 



Location: 



CUSTER NATIONAL FOREST, 1.5 MILES NORTH OF FORT HOWES RANGER STATION, 

 0.25 MILE WEST OF OTTER CREEK ROAD, SW OF STAG ROCK. 



Element occurrence data: 



CA. 1750 PLANTS IN 3 SUBPOPULATIONS SCATTERED ALONG CLIFF- LINE; LESS 

 THAN 10 PERCENT IN FLOWER; LARGE MATS. 



General site description: 



ERODING CLIFF-LINES IN SILTY-CLAY SOILS, BENEATH MODERATE COVER OF 

 PINUS PONDEROSA AND JUNIPERUS SCOPULORUM, WITH CALAMOVILFA LONGIFOLIA 

 AND ANDROPOGON SCOPARIUS. 



Land owner/manager: 



CUSTER NATIONAL FOREST, ASHLAND RANGER DISTRICT 



Comments : 



SEE GMF FOR BASE MAP SHOWING SUBPOPULATIONS. 



Information source: SCHASSBERGER, L. S. 1988. [FIELD SURVEYS IN POWDER 

 RIVER AND ROSEBUD COS. OF 12-21 MAY (ASTRAGALUS 

 BARRI I ) . ] 



Specimens: SCHASSBERGER, L. A. (190, 191). 1988. MONTU. 



