Dark brown, shiny, small lobes up to 5 mm wide, fringed with lobules and isidia. Apothecia dark brown, common.
West of Cascades crest in Washington; Alaska to Bay Area of California, Montana to New Mexico, Minnesota, Wisconsin, Maine to Louisiana; British Columbia, Alberta, band from Yukon Territories to Nova Scotia.
Humid forest with some tolerance to drier forest.
On bark and mossy rock.