MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: OENOTHERA PALLIDA VAR IDAHOENSIS 

 Common Name: PALE EVENING-PRIMROSE 



Global rank: G5T4Q Forest Service status: 

 State rank: SI Federal Status: 



Element occurrence code: PDONA0C0Y2 . 001 

 Element occurrence type: 



Survey site name: CENTENNIAL SANDHILLS 



EO rank: A 

 EO rank comments: 



County: BEAVERHEAD 



USGS quadrangle: LOWER RED ROCK LAKE 



Township: Range: Section: TRS comments: 

 013S 002W 22 NW4NE4; 23 S2NE4 



Precision: S 



Survey date: 1987-07-13 Elevation: 6680 - 



First observation: 1983 Slope/aspect: 



Last observation: 1987-07-13 Size (acres) : 10 



Location: 



CENTENNIAL SANDHILLS, AT THE NORTHEAST END OF THE CENTENNIAL VALLEY. 



Element occurrence data: 



101-1000 INDIVIDUALS, FLOWERING; SAND HILLS ARE RELATIVELY 

 UNDISTURBED, PARTICULARLY THOSE ON BLM LAND; COLONIES APPEAR TO BE 

 REPRODUCING WELL. SCATTERED. 



General site description: 



550-57 5 PLANTS ON CRESTS AND SLOPES OF UNSTABLE SAND HILLS, WITH 

 PSORALEA TENUIFLORA, ALLIUM TEXTILE. OFTEN IN RECENTLY-DISTURBED 

 SOILS, ESPECIALLY SQUIRREL MOUNDS. 



Land owner/manager: 



BLM: BUTTE DISTRICT, DILLON RESOURCE AREA 

 PRIVATELY OWNED LAND (INDIVIDUAL OR CORPORATE) 



Comments : 



INFORMATION NEEDED ON SAND DUNE DYNAMICS AND SUCCESSIONAL 

 STABILIZATION IN THE AREA. 



Information source: ROE, LISA SCHASSBERGER. [BOTANIST.] 556 SPENCER, 

 HELENA, MONTANA 59601. 



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Specimens: SCHASSBERGER, L. A. (112). 1987. MONTU , 

 LESICA, P. (2713, 2817). 1983. MONTU . 



