Scientific Name: AGROPYRON SPICATUM-ORYZOPSIS HYMENOIDES PA 

 Common Name: BLUEBUNCH WHEATGRASS-INDIAN RICEGRASS ASSOCIATION 



Global rank: G3? 

 State rank: S2? 



Forest Service status; 

 Federal Status; 



Element occurrence code: C6A2AAMBA0 . 001 



Survey site name: BLOCK MOUNTAIN BADLAND 



EO rank: B 

 EO rank comments: SOMEWHAT WEEDY, BUT BASICALLY PRISTINE 



BADLAND SITE. 



County: MADISON 



USGS quadrangle: BLOCK MOUNTAIN 



Township: 004S Range: 008W Section: 26 

 Township-range comments: ^IE4NE4 



Precision ; 



Survey date; 



First observation: 



Last observation; 



1991-06-03 



1991 



1991-06-03 



Elevation: 5480 

 Slope/aspect: 53% 

 Size (acres) : 1 



/ SOUTH 



Location: 



FROM GLEN, PROCEED SOUTH ON PAVEMENT CA. 0.7 5 MILE TO THE BURMA ROAD. 

 TAKE THIS ROAD 7.5 MILES TO SANDY HOLLOW. BLOCK MOUNTAIN IS 1.5 MILES 

 NORTHEAST. PLOT IS LOCATED IN PROMINENT BADLAND, 0.4 MILE SSW OF 

 HIGHEST SUMMIT OF BLOCK MOUNTAIN. 



Element occurrence data: 



WITHIN PLOT, 15 SPECIES OBSERVED. DOMINANTS INCLUDE: AGROPYRON 

 SPICATUM (TRACE CANOPY COVER) , ARISTIDA LONGISETA (3%) , ORYZOPSIS 

 HYMENOIDES (10%), GUTIERREZIA SAROTHRAE (1%), AND OPUNTIA POLYACANTHA 

 (1%). COMPLETE LIST ON FILE AT MONTANA NATURAL HERITAGE PROGRAM. 



General site description: 



BREAKLAND; PLOT POSITION IS MID-SLOPE. SANDSTONE PARENT MATERIAL AND 

 LITHIC USTIC TORRIORTHENT SOIL SUBGROUP. GROUND COVER: BARE SOIL 

 (70%), TOTAL COARSE FRAGMENTS (30%). 



Land owner/manager: 



BLM: BUTTE DISTRICT, DILLON RESOURCE AREA 



Comments: 



MTNHP PLOT #91RD001. SURVEY CONDUCTED BY R. L. DEVELICE, P. ACHUFF, 

 AND A. McALPINE. SITE CHARACTERIZED BY UNSTABLE SUBSTRATE AND HIGH 

 MICRO-SCALE LANDSCAPE DIVERSITY. 



Information source: 



DEVELICE, ROBERT. [COMMUNITY ECOLOGIST] . MONTANA NATURAL HERITAGE 

 PROGRAM, 1515 EAST 6TH AVE., HELENA, MT 59620. 



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