ELEMENT OCCURRENCE RECORD 37 



Grindelia howellii 



Occurrence number: 027 



Global rank: G3 Forest Service status: SENSITIVE LIST 

 State rank: S3 Federal Status: C2 



Survey site name: LOST HORSE CREEK 



EO rank: C 

 EO rank comments: MODERATE-SIZED POPULATION; SERIOUS 



KNAPWEED INVASION. 



County: MISSOULA 



USGS quadrangle: SALMON LAKE 



Township-range: 015N014W Section: 19 Precision: S 

 Township-range comments: SW4SE4 



Survey date: 1986-07-31 Elevation: 4000 

 First observation: 1986 Slope/aspect: 



Last observation: 1990-08-07 Size (acres) : 3 



Location: 



ALONG LOST HORSE CREEK, 1.0 AIR MILES WNW OF ITS CONFLUENCE WITH 

 CLEARWATER RIVER, CA. 3.3 AIR MILES NORTHWEST OF CLEARWATER JUNCTION. 



Element occurrence data: 



1986: CA. 200-250 PLANTS, IN FLOWER AND EARLY FRUIT; WEED COMPETITION 

 IS VERY SERIOUS (SPOTTED KNAPWEED) , AND PLANTS ARE SMALLER AND APPEAR 

 TO BE MORE FEEBLE, POSSIBLY AS A RESULT OF THIS COMPETITION. 1990: 11 

 PLANTS, WIDELY SEPARATED. 



General site description: 



GRAVELLY LOAM SOILS; PINUS PONDEROSA/FESTUCA SCABRELLA, WITH CENTAUREA 

 MACULOSA, PHLEUM PRATENSE, HYPERICUM PERFORATUM, POTENTILLA GRACILIS. 



Land owner/manager: 



BLACKLEAF WILDLIFE MANAGEMENT AREA 

 STATE LAND - UNDESIGNATED 



Comments: 



VOUCHER-SHELLY, J.S. (1280) AND G.V. KING, 1986, MONTU . 



Information source: 



SHELLY, J.S. 1986. FIELD SURVEYS IN MISSOULA AND POWELL COS. OF 25-26 

 JULY, 28-31 JULY, 2-6 AUGUST & 20-22 AUGUST. 



Montana Natural Heritage Program 



