February 6, 1996 



15 



MONTANA NATURAL HERITAGE PROGRAM 

 Element Occurrence Record 



Scientific Name: STEPHANOMERIA SPINOSA 

 Common Name: SPINY SKELETONWEED 



Global rank: G4 

 State rank: SI 



Forest Service status: 

 Federal Status: 



Element occurrence code: PDAST8U0E0 . 005 

 Element occurrence type: 



Survey site name 



EO rank 



EO rank comments 



MADISON RIVER 



A 



HIGH DENSITY DESPITE GRAZING, SUGGESTING THAT 



SPECIES IS AN "INCREASER" HERE. 



County: MADISON 



USGS quadrangle: CAMERON 



BUCKS NEST 



Township: Range: Section: TRS comments: 

 008S OOIW 24 N2; 14 NE4 



Precision 



Survey date 



First observation 



Last observation 



1995-09-01 Elevation: 5400 - 5420 

 1995-07-26 Slope/aspect: LEVEL 

 1995-09-01 Size (acres) : 200 



Location: 



MADISON RIVER, CA . 15 MILES SOUTH OF ENNIS ON US HWY 2f 

 SCATTERED ON ALLUVIAL BENCHES ON EAST SIDE OF RIVER. 



PhP^^TS ARE 



Element occurrence data: 



200+ WIDELY SCATTERED PLANTS IN 2 SUBPOPULATIONS . 90% EARLY FLOWER BUD 

 IN JULY, LATE FLOWER AND FRUIT IN AUGUST, PRODUCING NEW FLOWERS 

 THROUGH FROST WITH SUFFICIENT RAINFALL. 



General site description: 



OPEN, DRY SANDY CRESTS AND BOTTOMS. COARSE ALLUVIUM PARENT MATERIAL, 

 SANDY ROCKY SOIL. STIPA COMATA/BOUTELOUA GRACILIS HABITAT TYPE. 

 ASSOCIATED SPECIES: ELYMUS SPICATUS, SELAGINELLA DENSA, ASTRAGALUS 

 TERMINALIS, OXYTROPIS SERICEA, CHRYSOPSIS VILLOSA, PARONYCHIA 

 SESSILIFLORA, I>]USINEON DIVARICATUM, PHLOX HOODII, ARTEMISIA FRIGIDA, 

 BROMUS TECTORUM. 



Land owner/manager: 



BLM: BUTTE DISTRICT, 



DILLON RESOURCE AREA 



Comments : 



OBSERVED IN JULY BY J. VANDERHORST AND SURVEYED IN SEPTEMBER BY B. 

 HEIDEL. SITE NOT SURVEYED BEYOND CANAL OR BLM BOUNDARIES. SITE IS 

 HEAVILY GRAZED; OTHER SPECIES GROWING HERE ARE PROTECTED FROM GRAZING. 



Information source: 



VANDERHORST, J. [BOTANIST] 

 OGDEN, UTAH 84401. 



1515 LAKE STREET, 



Specimens: VANDERHORST, J. (5486). 1995. MONT. 

 HEIDEL, B. (1418). 1995. MONTU . 



