POLYGONUM DOUGLASII SSP AUSTINAE * 007 

 AUSTIN'S KNOTWEED 



Global rank: G5T4 Forest Service status: SENSITIVE 

 State rank: S2 Federal Status: 



Survey site name: DRY CREEK SHALE BARRENS 



EO rank: AB 

 EO rank comments: LARGE POPULATION AND HIGH VIABILITY WITH DIVERSITY 

 OF OUTCROP SLOPES. 



County: BROADWATER 



USGS quadrangle: SIXMILE MOUNTAIN 



Township: Range: Section: TRS comments: 

 006N 004E 27 SW4SE4, 34 NW4NE4 



Survey date: 1992-08-10 Elevation: 5680 -5850 

 First observation: 1992-08-10 Slope/aspect: 20-35% / SOUTH 

 Last observation: 1992-08-10 Size (acres) : 



Location: 



BIG BELT MOUNTAINS, OVER 5 MILES EAST OF SIGN MARKING HELENA 



NATIONAL FOREST BOUNDARY, CA. 0.2 5 MILE WEST OF SECTION LINE 



GATE AND FORK BETWEEN OLD AND NEW ROADBEDS. 



Element occurrence data: 



ESTIMATED OVER 3 00 INDIVIDUALS; INCOMPLETELY SURVEYED. 

 EXTENSIVE POTENTIAL HABITAT OF GOOD QUALITY. OCCASIONAL 

 ACROSS RECURRENT SOUTH-FACING OUTCROP HABITAT; PAST FRUITING 

 AND IN EARLY STAGES OF LEAF SENESCENCE. 



General site description: 



BROAD SOUTH-FACING SHALE OUTCROP SLOPES ABOVE OLD ROADBED 

 AND BEAVER-IMPOUNDED WATERCOURSE, BELOW PINUS PONDEROSA AND 

 AGROPYRON SPICATUM HABITAT TYPES. ON UPPER SLOPES IN 

 ASSOCIATION WITH POLYGONUM DOUGLASII VAR DOUGLASII, 

 PENSTEMON ATTENUATUS, ARENARIA NUTTALLII, RIBES CEREUM, 

 BROMUS JAPONICUS, CHAENACTIS DOUGLASII, MENTZELIA DISPERSA, 

 PHACELIA HASTATA. 



Land owner /manager : 



HELENA NATIONAL FOREST, TOWNSEND RANGER DISTRICT 



Comments: 



POTENTIAL HABITAT EXTENDS FOR OVER 1 MILE IN SECTIONS 27 AND 

 28. 



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 



