Scientific Name: PSEUDOTSUGA MENZIESII/CERCOCARPUS LEDIFOLIUS PA 

 Common Name: DOUGLAS FIR/ CURL-LEAF MOUNTAIN MAHOGANY ASSOCIATION 



Global rank: 

 State rank: 



G3? Forest Service status; 

 S3? Federal Status; 



Element occurrence code: C2A2BBABH0 . 002 



Survey site name; 



EO rank; 



EG rank comments; 



SELWAY SPRING 



EC 



MODERATE TO HEAVY BROWSING BY DEER ON 



THIS STEEP, UNSTABLE SLOPE HAS RESULTED 



IN SOME SITE DEGRADATION. 



County: SILVER BOW 



USGS quadrangle: MELROSE 



Township: OOIS Range: 009W Section: 15 

 Township-range comments: SE4SW4 



Survey date : 



First observation: 



Last observation: 



1001-06-10 



1991 



1991-06-10 



Precision; 



Elevation: 5920 

 Slope/aspect: 35% / WEST 

 Size (acres) : 5 



Location: 



FROM DIVIDE (TOWN) , PROCEED EAST 1 MILE ON STATE HIGHWAY 4 3 TO 

 INTERSTATE 15. DRIVE UNDER OVERPASS AND PARK BY FENCE ON EAST SIDE OF 

 INTERSTATE. PLOT IS CA. 1.5 MILES SOUTHEAST IN FOREST JUST ABOVE THE 

 FOREST-GRASSLAND ECOTONE, AND UPSLOPE FROM SELWAY SPRING. 



Element occurrence data: 



WITHIN PLOT, 18 SPECIES OBSERVED. DOMINANTS INCLUDE: PSEUDOTSUGA 

 MENZIESII (20% CANOPY COVER), CERCOCARPUS LEDIFOLIUS (70%), ARTEMISIA 

 FRIGIDA (TRACE) , AGROPYRON SPICATUM (TRACE) , AND POA SANDBERGII 

 (TRACE) . COMPLETE LIST ON FILE AT MONTANA NATURAL HERITAGE PROGRAM, 



General site description: 



RESIDUAL MOUNTAIN SLOPE; PLOT POSITION IS MID-SLOPE. GRANITE PARENT 



MATERIAL AND TYPIC USTORTHENT SOIL SUBGROUP. GROUND COVER: BARE SOIL 



(10%), TOTAL COARSE FRAGMENTS (70%). 



Land owner/manager: 



BLM: BUTTE DISTRICT, HEADWATERS RESOURCE AREA 

 HUMBUG SPIRES PRIMITIVE AREA 



Comments: 



MTNHP PLOT #91RD015. SURVEY CONDUCTED BY R. L. 



DEVELICE. 



Information source: 



DEVELICE, ROBERT L. 

 PROGRAM, 1515 EAST 



[COMMUNITY 

 SIXTH AVE. , 



ECOLOGIST] , 

 HELENA, MT 



MONTANA 

 59620. 



NATURAL HERITAGE 



161 



