Scientific Name: ARTEMISIA TRIDENTATA/AGROPYRON SPICATUM PA 

 Common Name: BIG SAGEBUSH/BLUEBUNCH WHEATGRASS ASSOCIATION 



Global rank: G5 

 State rank: S5 



Forest Service status: 

 Federal Status; 



Element occurrence code: C3A2BCACA0 . 021 



Survey site name; 



EO rank; 



EO rank comments; 



HOGBACK NORTHWEST 



BC 



THE HIGH COVER OF INCREASER SPECIES 



SUGGEST DEGRADATION BY GRAZING. 



County: BEAVERHEAD 



USGS quadrangle: BLOCK MOUNTAIN 



Township: 005S Range: 008W Section; 

 Township-range comments: NE4SW4 



Survey date: 



First observation; 



Last observation; 



1991-06-06 



1991 



1991-06-06 



03 



Precision; 



Elevation: 5110 



Slope/aspect: 53% / NORTHWEST 



Size (acres) : 10 



Location: 



FROM GLEN, PROCEED SOUTH ON PAVEMENT 7.4 MILES TO GRAVEL CROSSROAD. 

 TAKE THIS GRAVEL ROAD 0.6 MILE EAST TO AN INTERSECTION WITH A SIDE 

 ROAD. FOLLOW THE SIDE ROAD CA. 3 MILES TO A Y INTERSECTION, GO RIGHT, 

 AND FOLLOW THE MOST PROMINENT ROAD CA . 2 MILES TO THE RIVER. PLOT IS 

 0.7 MILE DUE EAST. 



Element occurrence data: 



WITHIN PLOT, 17 SPECIES OBSERVED. DOMINANTS INCLUDE: ARTEMISIA 

 TRIDENTATA (40% CANOPY COVER), ARTEMISIA FRIGIDA (10%), AGROPYRON 

 SPICATUM (30%), POA SANDBERGII (10%), AND STIPA COMATA (3%). COMPLETE 

 LIST ON FILE AT MONTANA NATURAL HERITAGE PROGRAM. 



General site description: 



STRUCTURALLY CONTROLLED MOUNTAIN SLOPE; PLOT POSITION IS MID-SLOPE. 

 QUARTZITE PARENT MATERIAL AND LITHIC ARGIBOROLL SOIL SUBGROUP. GROUND 

 COVER: BARE SOIL (3%), TOTAL COARSE FRAGMENTS (40%). 



Land owner/manager: 



BLM: BUTTE DISTRICT, DILLON RESOURCE AREA 



Comments: 



MTNHP PLOT 

 McALPINE. 



#91RD010. SURVEY CONDUCTED BY R. L. DEVELICE AND A. 



Information source: 



DEVELICE, ROBERT L. 

 PROGRAM, 1515 EAST 



[COMMUNITY 

 SIXTH AVE. , 



ECOLOGIST] , 

 HELENA, MT 



MONTANA 

 59620. 



NATURAL HERITAGE 



126 



