The species occupies
Arctic and
alpine habitats.[1][7] It is classified as "Imperiled" in
British Columbia[8] and in Britain is considered to be "Critically Endangered".[9]
^Rothero, Gordon "Bryophytes", in Shaw, Philip and Thompson, Des (eds.) (2006) The Nature of the Cairngorms: Diversity in a changing environment. Edinburgh. The Stationery Office.
ISBN0-11-497326-1. p. 200.
^It is specifically identified as an "
Arctic–alpine" species by Rothero (2006) p. 209 although the Biodiversity Scotland database describes it as "
montane".