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ELEMENT OCCURRENCE RECORD 

 Astragalus molybdenus (Leadville milk-vetch) 



Occurrence niimber: 004 



Global rank: G3 Forest Service status: SENSITIVE LIST 

 State rank: SI USFWS Status: NONE 



Survey site name: ROCKY MOUNTAIN-WEST 



EO rank: A 

 EO rank comments: LARGE COLONIES, IN UNDISTURBED ALPINE 

 AREAS . 



County: TETON 



USGS quadrangle: OUR LAKE 



Township-range: 024N 009W Section: 19, S2; Section: 30, N2 



Survey date: 1989-08-10 Elevation: 8000 

 First observation: 1989 Slope/aspect: 0-35% / N,NW,W 



Last observation: 1989-08-10 Size (acres) : 20 



Location : 



SAWTOOTH RANGE, WEST AND NW SLOPES OF ROCKY MOUNTAIN PEAK, 0.3-0.75 AIR 

 MI. SOUTH TO SSE OF HEADQUARTERS CREEK PASS. 



Element occurrence data: 



FIVE SUBPOPULATIONS OBSERVED, SOME SPREADING EXTENSIVELY BY VEGETATIVE 

 REPRODUCTION; POPULATION SIZE DIFFICULT TO ESTIMATE. 



General site description: 



ALPINE HABITATS, 7640 - 9200', ALMOST ALWAYS IN DRYAS OCTOPETALA MATS 

 BUT OCCASIONALLY IN SCREE, ON LIMESTONE SOBSTRATE; WITH SMELOWSKIA 

 CALYCINA, ANTENNARIA AROMATICA, ANDROSACE LEHMANNIANA, SAXIFRAGA 

 BRONCHIALIS, ERIGERON LACKSCHEWITZII, SALIX NIVALIS, ZIGADENUS 

 ELEGANS. 



Land owner/manager: 



BOB MARSHALL WILDERNESS AREA 



LEWIS & CLARK NATIONAL FOREST, ROCKY MOUNTAIN RANGER DISTRICT 



Comments : 



VOUCHERS-SHELLY, J.S. (1602) AND L.A. SCHASSBERGER, NY, MONT, 1989. 



Information source: 



SHELLY, J.S. 1989. FIELD SURVEYS IN TETON COUNTY, 7-10, 21-23, AND 

 28-30 AUGUST. 



Montana Natural Heritage Program 



