Erigeron lanatus
It is native to western North America , where it occurs in the mountains straddling the border between British Columbia and Alberta and Montana , with isolated populations occurring as far north as Yukon and as far south as Colorado . 
<triplet> British Columbia <subj> Alberta <obj> shares border with <subj> Montana <obj> shares border with <subj> Yukon <obj> shares border with <triplet> Alberta <subj> British Columbia <obj> shares border with <subj> Montana <obj> shares border with <triplet> Montana <subj> British Columbia <obj> shares border with <subj> Alberta <obj> shares border with <triplet> Yukon <subj> British Columbia <obj> shares border with