Erigeron muirii
It has been found only in northern Alaska and the northern Yukon Territory , including Herschel Island in the Arctic Ocean . 
<triplet> Alaska <subj> Yukon Territory <obj> shares border with <triplet> Yukon Territory <subj> Alaska <obj> shares border with <triplet> Herschel Island <subj> Yukon Territory <obj> located in the administrative territorial entity