76 



maps on pp. 79 and 81. Photographs are provided on 

 pp. 82-83. Field surveys were conducted by the 

 author on 6-7 July 1989 and 2 August 1989. 



HISTORICAL SITES (GALLATIN NATIONAL FOREST) : A 

 survey at the Cinnamon Creek Ranger Station was 

 successful in relocating a population of Salix 

 wolf ii var. wolf ii collected in 1947. Extending 

 the survey from Cinnamon Creek to the nearby 

 Gallatin River confirmed the occurrence of the 

 species there as well. 



E. HABITAT 



ASSOCIATED VEGETATION: Salix wolfii var. wolfii 

 occurs on streambanks and low ground where the 

 vegetation is dominated by other willows, bog 

 birch, grasses and sedges. Plants associated with 

 S. wolfii var. wolfii along Cinnamon Creek include; 



Aqrostis variabilis (variant bentgrass) 



Artemisia ludoviciana (prairie sage) 



Aster eatonii (Eaton's aster) 



A. foliaceus (leafy aster) 



Astragalus americanus (American milk-vetch) 



Betula qlandulosa (bog birch) 



Castilleia miniata (scarlet paintbrush) 



Gentiana af finis (pleated gentian) 



Geum macrophyllum (largeleaved avens) 



Glyceria elata (tall mannagrass) 



Heracleum lanatum (cow-parsnip) 



Mimulus quttatus (yellow monkey-flower) 



Phleum pratense (timothy) 



Potentilla fruticosa (shrubby cinquefoil) 



P. gracilis (slender cinquefoil) 



Ribes inerme (whitestem gooseberry) 



Symphoricarpos albus (snowberry) 



TOPOGRAPHY AND SOILS: Salix wolfii var. wolfii 

 occurs at elevations from 1900 to 2000 m (6400 to 

 6600 ft.). Populations were found on low ground 

 associated with streams and riverbanks, in places 

 where the soil is likely to be saturated during at 

 least part of the growing season. Soils were 

 either loams or sandy loams. 



F. POPULATION DEMOGRAPHY AND BIOLOGY 



1. POPULATION SIZE AND CONDITION: In the 0.8 km of 

 streambanks and floodplains surveyed at Cinnamon 

 Creek (003) , 86 plants were noted. These were 

 vigorous individuals of unknown age. The number of 

 plants found along the Gallatin River (004) was not 



