21 



Occurrence number: 006 



Global rank: G3G4 Forest Service status: SENSITIVE 

 State rank: SI Federal Status: 



Survey site name: ELK LAKE 



EO rank: A 

 EO rank comments: EXCELLENT SITE WITH WELL ESTABLISHED 



POPULATIONS . 



County : BEAVERHEAD 



USGS quadrangle: ELK SPRINGS 



Township: 013S Range: 001E Section: 17 Precision: S 

 Township-range comments: SW4 , S2 0, CENTRAL 



Survey date: 1991-08-20 Elevation: 7400 

 First observation: 1991 Slope/aspect: 0-40% / SOUTHWEST, 



WEST, EAST 

 Last observation: 1991-08-20 Size (acres) : 25 



Location: 



CENTENNIAL VALLEY; SITE IS CA. 1 MILE NORTH OF ELK LAKE. FOLLOW ROAD 

 ON WEST SIDE OF LAKE TO RIDGE TOP, PARK AND WALK WEST CA. 0.2 MILE TO 

 SMALL ROCKY RIDGE. OTHER SITES ARE UP A DRY FORK OF NARROWS CREEK. 



Element occurrence data: 



120 PLANTS IN FOUR SUBPOPULATIONS , IN FLOWER AND FRUIT. 



General site description: 



OPEN, ERODING SCREE SLOPES (TERTIARY VOLCANIC ROCK), WITH RUBUS IDAEUS, 

 JUNIPERUS COMMUNIS, SPIRAEA BETULIFOLIA AND POLYPODIUM VULGARE. 

 SURROUNDING FOREST IS PSEUDOTSUGA MENZIESII, JUNIPERUS SCOPULORUM AND 

 POPULUS TREMULOIDES. 



Land owner/manager: 



BEAVERHEAD NATIONAL FOREST, MADISON RANGER DISTRICT 



Comments: 



PLANTS ARE MORE OFTEN AT THE TOP OF SCREE SLOPES. 



Information source: 



ROE, LISA S., MONTANA NATURAL HERITAGE PROGRAM, 1515 EAST SIXTH AVE., 

 HELENA, MT 59620. 



Element Occurrence Record - Cirsium subniveum 

 Montana Natural Heritage Program 



