Scientific Name: PICEA SP/EQUISETUM ARVENSE PA 

 Common Name: SPRUCE/FIELD HORSETAIL ASSOCIATION 



Global rank: G4 Forest Service status: 

 State rank: S3 Federal Status: 



Element occurrence code: C1A9CDACA0 . 002 



Survey site name: UPPER RED ROCK LAKE 



EO rank: A 

 EO rank comments: VERY HIGH QUALITY OLD-GROWTH PICEA 



ENGELMANNII WETLAND SITE. 



County: BEAVERHEAD 



USGS quadrangle: UPPER RED ROCK LAKE 



Township: 014S Range: OOIW Section: 22 Precision: S 



Township-range comments: SE4SE4 



Survey date: 1991-07-26 Elevation: 6620 

 First observation: 1991 Slope/aspect: 3% / NORTH 



Last observation: 1991-07-26 Size (acres) : 10 



Location: 



FROM MONIDA, PROCEED EAST ON MAIN GRAVEL ROAD CA. 3 2 MILES TO UPPER 

 LAKE CAMPGROUND. CONTINUE PAST CAMPGROUND 1.5 MILES AND PARK. THE PLOT 

 IS IN THE PROMINENT SPRUCE STAND 0.2 MILE DUE NORTH. 



Element occurrence data: 



WITHIN PLOT, 29 SPECIES OBSERVED. DOMINANTS INCLUDE: PICEA ENGELMANNII 

 (80% CANOPY COVER) , LINNAEA BOREALIS (20%) , CALAMAGROSTIS CANADENSIS 

 (10%), ACTAEA RUBRA (20%), AND EQUISETUM ARVENSE (50%). COMPLETE LIST 

 ON FILE AT MONTANA NATURAL HERITAGE PROGRAM. 



General site description: 



LACUSTRINE BASIN; PLOT POSITION IS TERRACE IN WIDE VALLEY BOTTOM. 

 MIXED ALLUVIUM PARENT MATERIAL AND HISTIC CRYAQUALL SOIL SUBGROUP. 

 GROUND COVER: BARE SOIL (TRACE) , TOTAL COARSE FRAGMENTS (0%) . 



Land owner/manager: 



RED ROCK LAKES WILDERNESS 



RED ROCK LAKES NATIONAL WILDLIFE REFUGE 



Comments: 



MTNHP PLOT #91RD043. SURVEY CONDUCTED BY R. L. DEVELICE. THE PICEA 

 TREES PRESENT APPEAR TO BE P. ENGELMANNII X P. GLAUCA HYBRIDS. 



Information source: 



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

 PROGRAM, 1515 EAST SIXTH AVE., HELENA, MT 59620. 



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