POLYGONUM DOUGLASII SSP AUSTINAE * 006 

 AUSTIN'S KNOTWEED 



Global rank: G5T4 

 State rank: S2 



Forest Service status: SENSITIVE 

 Federal Status: 



Survey site name: DRY CREEK TRAIL 



EO rank: D 

 EO rank comments: VERY SMALL POPULATION IN HIGHLY-DISTURBED SETTING. 



County: BROADWATER 



USGS quadrangle: DEER PARK 



Township: Range: Section: TRS comments: 

 006N 003E 25 NE4 



Survey date: 1992-08-10 



First observation: 1992-08-10 



Last observation: 1992-08-10 



Elevation: 4920 

 Slope/aspect: 5% / SOUTH 

 Size (acres) : 



Location: 



BIG BELT MOUNTAINS, CA. 1 

 THE HELENA N.F. BOUNDARY, 

 OPPOSITE CABIN. 



MILE EAST ON DRY CREEK ROAD FROM 

 ON NORTH SIDE OR ROAD ALMOST 



Element occurrence data: 



6 PLANTS IN LATE FRUIT. 



General site description: 



SMALL SHALE OUTCROP MOUND SURROUNDED BY HIGHLY-DISTURBED 

 AGROPYRON SPICATUM HABITAT TYPE AND PINUS PONDEROSA H.T. IN 

 MORE SHELTERED ASPECTS. OCCASIONAL IN VERY SMALL, DISTURBED 

 POTENTIAL HABITAT. INVADED BY BROMUS JAPONICUS. ASSOCIATED 

 SPECIES: POLYGONUM DOUGLASII VAR DOUGLASII, CHRYSOPSIS 

 VILLOSA, ARTEMISIA TRIDENTATA, CAPSELLA BURSA-PASTORIS, 

 GAYOPHYTON DECIPIENS, EUPHORBIA SPP. 



Land owner /manager: 



HELENA NATIONAL FOREST, TOWNSEND RANGER DISTRICT 



Comments: 



THIS SITE REFLECTS ITS PERSISTENCE UNDER INVASION BY EXOTIC 

 GRASSES IN SMALL HABITAT. 



Information source: 



HEIDEL, B. 1992. [MTNHP FIELD SURVEY TO DRY CREEK OF 10 

 AUGUST. ] 



Specimens: 



Element Occurrence Record 



Plant Species of Special Concern 



Big Belt and Elkhorn Mountains 



