Element Occurrence Record 

 Howellia aguatilis 



29 



Occurrence number: 007 



Global rank: G2 

 State rank: S2 



Survey site name: 



EO rank: 



EO rank comments: 



County : LAKE 

 USGS quadrangle: 



Forest Service status: 

 Federal Status: 



SENSITIVE LIST 

 CI 



SWAN RIVER WEST 



AB 



VERY LARGE POPULATION; NEARBY STATE LAND 



IS LOGGED. 



CILLY CREEK 



Township-range: 024N018W Section: 

 Township-range comments: SW4SE4SE4 



Survey date: 1987-07-01 

 First observation: 1987 

 Last observation: 1990-07-17 



14 



Precision: S 



Elevation: 3190 

 Slope/aspect: LEVEL 

 Size (acres) : 1 



Location: 



•WEST SIDE OF SWAN VALLEY, 1.4 AIR MILES WEST OF ST. HWY. 83; 0.57 AIR 

 MILE WEST OF SWAN RIVER; CA. 6.5 AIR MILES SOUTH OF SWAN LAKE (TOWN). 



Element occurrence data: 



1990: 500-1000 PLANTS; 1989: 1000-2000 PLANTS; 1987: ABOUT 3000-4000 

 PLANTS, POSSIBLY MORE PLANTS; VERY DENSE, AND FORMING MATS, IN WEST 

 POND; THE TWO PONDS, WHICH ARE SEPARATED BY A SALIX BORDER, ARE JOINED 

 BY HIGHER WATER IN THE SPRING. 



General site description: 



IN TWO SMALL, ADJACENT GLACIAL POTHOLES, IN 1-2 FEET OF WATER; WITH 

 CAREX VESICARIA, EQUISETUM FLUVIATILE, SIUM SUAVE; POPULUS 

 TRICHOCARPA, BETULA PAPYRIFERA AROUND PONDS. 



Land owner/manager: 



FLATHEAD NATIONAL FOREST, SWAN LAKE RANGER DISTRICT 



Comments : 



VOUCHER-SHELLY, J.S. (1356), 1987, MONTU. pH = 7.20 IN WEST POND. 



Information source: 



SCHASSBERGER, L. A. 1990. MONITORING AND FIELD SURVEYS OF 10-13 AND 

 17-19 JULY (HOWELLIA AQUATILIS) . 



Montana Natural Heritage Progrs 



