MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: PENSTEMON ANGUSTIFOLIUS 

 Common Name: NARROWLEAF PENSTEMON 



Global rank: G5 

 State rank: S2 



Forest Service status : 

 Federal Status : 



I 



Element occurrence code: PDSCR1L0C0 . 010 

 Survey site name: WEST PLUM CREEK RESERVOIR 



EO rank: 

 EO rank comments: 

 County : CARTER 

 USGS quadrangle: NORTH SLICK CREEK 



Township : 

 002S 



Range : 

 062E 



Section: 

 29 



TRS comments : 

 SE4SW4 



Precision 



Survey date 



First observation 



Last observation 



Elevation: 3540 - 3560 

 1994-06-24 Slope/aspect: 0-15% / SW, NE, WEST 

 1994-06-24 Size (acres) : 2 



Location: 



CA. 0.2 MILE SOUTHWEST OF WEST PLUM CREEK RESERVOIR. PARK AT CURVE IN 

 ROAD ALONG PLUM CREEK AT THE TOP OF THE RIDGE, NORTH OF A CATTLE GUARD 

 AND WALK SOUTHEAST CA. 150M ALONG TOP OF RIDGE TO WHERE PINES END TO 

 PLANTS. 2ND SUBPOPULATION IS NORTH OF PARKING AREA, ALONG FENCELINE . 



Element occurrence data: 



2 SUBPOPULATIONS , 40 PLANTS TOTAL (13 ON RIDGE, AT LEAST 25 NORTH) . ALMOST ALL 

 IN FRUIT IN NORTHERN SUBPOPULATION. MANY DEAD STEMS FROM PREVIOUS YEAR ON RIDGE. 

 SHOOTS ON BLOWOUT. 



YOUNG 



General site description: 



DRY, MOSTLY OPEN UPPERSLOPE RIDGES WITHIN VALLEY IN DISSECTED MESA. 

 SANDSTONE PARENT MATERIAL, BROWN SANDY LOAM AND GRAVELLY SAND SOIL. 

 ASSOCIATED SPECIES: CAREX FILIFOLIA WITH BOUTELOUA GRACILIS, STIPA 

 COMATA, ANDROPOGON HALLII, WITH OCCASIONAL YUCCA GLAUCA, RHUS 

 TRILOBATA, PSORALEA ARGOPHYLLA. ALSO KOELERIA MACRANTHA, LYGODESMIA 

 JUNCEA, ARTEMISIA CAMPESTRIS, TRADESCANTIA OCCIDENTALIS , PSORALEA 

 ESCULENTA, PINUS PONDEROSA. 



Land owner/manager: 



CUSTER NATIONAL FOREST, SIOUX RANGER DISTRICT 



Comments : 



OBSERVED BY K. DUEHOLM . MODERATE GRAZING NOTED. THE NORTH SUBPOPULATION LOOKS 

 HEALTHY, BUT THE RIDGE POPULATION CONSISTS OF OLD STEMS FROM THE PREVIOUS YEAR 

 AND A FEW BASAL OR SMALL SHOOTS IN OPEN AREAS. 



Information source: 



SENSITIVE PLANT COORDINATOR, CUSTER NATIONAL FOREST, 2602 

 FIRST AVENUE NORTH, P.O. BOX 2556, BILLINGS, MT 59103. 



Specimens : 



