January 4, 1994 



MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: ARABIS FECUNDA 

 ICommon Name: SAPPHIRE ROCKCRESS 



Global rank: 

 State rank: 



G2 

 S2 



Forest Service status: SENSITIVE 

 Federal Status: C2 



Element occurrence code: 

 Element occurrence type: 



PDBRA06290.016 



Survey site name: 



EO rank: 



EG rank comments: 



TUCKER CREEK 



County: SILVER BOW 



USGS quadrangle: TUCKER CREEK 



Precision: S 



Survey date: 1992-06-27 



First observation: 1992-06-27 



Last observation: 1992-06-30 



Elevation: 6640 - 6880 

 Slope/aspect: 35% / SOUTH 

 Size (acres) : 40 



Location: 



FROM DIVIDE (TOWN), TAKE FRONTAGE ROAD NORTH CA. 5 MILES. GO EAST 

 UNDER 1-15 TO RANCH, THEN TAKE ROAD TO RESERVOIR. SITE IS ON HILL 

 NORTH OF RESERVOIR. 



Element occurrence data: 



10,000+ INDIVIDUALS, FRUITING, SEED DISPERSAL. 



General site description: 



OPEN EXPOSURE ON UNDULATING SLOPE, DRY AREA ON RESIDUAL MOUNTAIN 

 MIDSLOPE. SANDY SOIL OF CALCAREOUS METASEDIMENT PARENT MATERIAL. 

 ASSOCIATED DOMINANT SPECIES: CERCOCARPUS LEDIFOLIUS, AGROPYRON 

 SPICATUM, HAPLOPAPPUS ACAULIS. ADDITIONAL ASSOCIATED SPECIES: 

 ORYZOPSIS HYMENOIDES, CYMOPTERUS BIPINNATUS . 



Land owner /manager : 



BLM: BUTTE DISTRICT, HEADWATERS RESOURCE AREA 

 STATE LAND - UNDESIGNATED 

 HUMBUG SPIRES PRIMITIVE AREA 



Comments : 



ECODATA PLOT #92PL105. LITTLE OR NO LIVESTOCK DISTURBANCE, 

 SITE ALSO VISITED BY L. ROE IN 1992; PLOT #92LR045. 



DEER SCAT. 



Information source: 



Specimens; 



LESICA, PETER. DIVISION OF BIOLOGICAL SCIENCES, 

 UNIVERSITY OF MONTANA, MISSOULA, MT 59812. 



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