14 



Dominance and frequency of the tzixon: Eriqeron 

 lackschewitzii generally occurs as a rare, 

 uncoimnon, or occasional species in its plant 

 cominunities, but was noted as "common" at its 

 largest population site. It is not among the 

 community dominants. 



Successional phenomena: Bamberg (1964) 

 proposed that Dryas mats lead successionally to 

 sedge meadow turf. If Dryas cover and sedge 

 cover are indicative of succssional status, 

 then Eriqeron lackschewitzii is present over a 

 wide range of successional stages. Dryas 

 species fix nitrogen, indicative of the 

 successional role in building soil fertility. 



The single site of E. lackschewitzii 

 intermixerd with tree cover of Pinus f lexilis 

 had been burned within recent years, killing 

 the krummholtz tree growth over most of the 

 burn slope. This is insufficient information 

 for characterizing fire response of the 

 species. 



Dependence on dynzunic aspects of biotic 

 associations and ecosystem features: The 

 exposed alpine habitat occupied by E. 

 lackschewitzii has climate extremes within the 

 growing season and this may reflect a relation 

 with dynamic ecosystem features. 



Other endangered, threatened/ rare, or 

 vulnerable species occurring in habitat of this 

 taxon: Eriqeron lackschewitzii is on the same 

 summits as six other plant species of state 

 concern. It sometimes adjoins or overlaps 

 habitat with the first of these, but is 

 otherwise in different localized settings. 



Astraqalus molvbdenus (G3S2) 



Botrychium pradoxum . another Category 2 species 

 (GlSl) 



Cardamine rupicola . another Montana endemic 

 (G3S3) 



Carex maritima var. incurviformis (G2G3T7S1) 



Oxvtropis podocarpa (G4S1) 



