MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: TARAXACUM ERIOPHORUM 

 Common Name: ROCKY MOUNTAIN DANDELION 



Global rank: G4 Forest Service status: 

 State rank: SI Federal Status: 



Element occurrence code: PDAST930G0 . 004 

 Element occurrence type: 



Survey site name: PILEUP CANYON 



EO rank: C-D 

 EO rank comments: SIGNIFICANT CATTLE IMPACTS AT SITE; EXOTICS. 



County: BEAVERHEAD 



USGS quadrangle: CABOOSE CANYON 



Township: Range: Section: TRS comments: 

 014S Glow 33 W2 



Precision: S 



Survey date: 1993-06-12 Elevation: 7080 - 7400 



First observation: 1993-06-12 Slope/aspect: LEVEL 



Last observation: 1993-07-13 Size (acres): 2 



Location: 



FROM DELL, FOLLOW BIG SHEEP CREEK ROAD CA. 15 MILES TO PILEUP GULCH, 

 THEN TAKE DIRT ROAD UP CANYON TO ITS END. PLANTS ARE CA. 0.5 MILE 

 FURTHER UP IN BOTTOM OF CANYON ON MAIN LIVESTOCK TRAIL. 



Element occurrence data: 



2 SUBPOPULATIONS. NORTHERN: CA. 50 PLANTS, MOST DISPERSING FRUIT; 

 SOUTHERN: 28 PLANTS, 95% FRUITING, 5% VEGETATIVE. SOME HEADS DEHISCED. 



General site description: 



PARTIAL SHADE TO OPEN MOIST CANYON BOTTOM FLOODPLAIN. ALLUVIUM PARENT 

 MATERIAL, FINE CLAY-SILT SOIL. ASSOCIATED SPECIES: ARTEMISIA 

 TRIDENTATA VAR. TRIDENTATA, TARAXICUM LAEVIGATUM, POA SP., ELYMUS 

 CINEREUS, ACHILLEA MILLEFOLIUM, MERTENSIA OBLONGIFOLIA, ANTENNARIA 

 MICROPHYLLA, AGOSERIS GLAUCA. 



Land owner /manager : 



BLM: BUTTE DISTRICT, DILLON RESOURCE AREA 



Comments : 



WEEDS AND CATTLE DROPPINGS AT SITE — MANY PLANTS WITH BROWSED HEADS. 

 LACKSCHEWITZ LOCATED AN "EXTENSIVE" POPULATION NEARBY IN SECTION 9 BUT 

 THIS WAS NOT RELOCATED ALTHOUGH A SEARCH WAS MADE. 



Information source: LESICA, PETER. DIVISION OF BIOLOGICAL SCIENCES, 

 UNIVERSITY OF MONTANA, MISSOULA, MT 59812. 



Specimens: VANDERHORST, J. (4939). 1993. MONT. 

 LESICA, P. (6101) . 1993. 



