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 . 024 



Survey site name; 



EO rank; 



EO rank comments; 



MAIDEN EXCLOSURE - SOUTHWEST 



BC 



THE SITE APPEARS TO HAVE BEEN HEAVILY 



GRAZED PRIOR TO EXCLOSURE ESTABLISHMENT 



IN 1984, AND CONTAINS CENTAUREA MACULOSA 



AND BROMUS TECTORUM. 



County: BEAVERHEAD 



USGS quadrangle: MELROSE 



Township: OOIS Range: 009W Section: 32 

 Township-range comments: SW4SE4 



Survey date: 



First observation: 



Last observation: 



1991-06-18 



1991 



1991-06-18 



Precision: S 



Elevation: 5330 

 Slope/aspect: 2% / NORTH 

 Size (acres) : 2 



Location: 



FROM THE MOOSE CREEK ROAD EXIT (#99) ON INTERSTATE 15, PROCEED NORTH 

 AND WEST ON FRONTAGE ROAD 0.5 MILE TO JUNCTION WITH A GRAVEL ROAD. 

 TAKE THIS GRAVEL ROAD SOUTH 1.2 MILES TO A Y INTERSECTION. GO LEFT AND 

 RIGHT CA. 1 MILE TO A BRIDGE CROSSING THE RIVER. CROSS THE BRIDGE. 

 EXCLOSURE IS TO THE RIGHT, 



Element occurrence data: 



WITHIN PLOT, 28 SPECIES OBSERVED. SOMINANTS INCLUDE: ARTEMISIA 

 TRIDENTATA (20% CANOPY COVER) , AGROPYRON SPICATUM (30%) , KOELERIA 

 CRISTATA (20%), POA SANDBERGII (10%), AND STIPA COMATA (10%). COMPLETE 

 LIST ON FILE AT MONTANA NATURAL HERITAGE PROGRAM. 



General site description: 



ALLUVIAL TERRACE; PLOT POSITION IS TERRACE IN WIDE VALLEY BOTTOM. 

 MIXED ALLUVIUM PARENT MATERIAL AND USTIC TORRIFLUVENT SOIL SUBGROUP. 

 GROUND COVER: BARE SOIL (20%), TOTAL COARSE FRAGMENTS (3%). 



Land owner/manager: 



BLM: BUTTE DISTRICT, HEADWATERS RESOURCE AREA 

 PRIVATELY OWNED LAND (INDIVIDUAL OR CORPORATE) 



Comments : 



MTNHP PLOT #91RD02 5. SURVEY CONDUCTED BY R. L. DEVELICE. EXCLOSURE 

 ESTABLISHED IN 1984 (PERS. COMM., JACK JONES, BLM, BUTTE). CA. 30% OF 

 THE ARTEMISIA TRIDENTATA PLANTS PRESENT ARE DEAD. 



Information source: 



DEVELICE, ROBERT L. 

 PROGRAM, 1515 EAST 



[COMMUNITY 

 SIXTH AVE. , 



ECOLOGIST] . 

 HELENA, MT 



MONTANA 

 59620. 



NATURAL HERITAGE 



128 



