U.S.A., Michigan, Emmet, Near Cross Village Sturgeon Bay, Lake Michigan.
On Acer.
On bark of sugar maple in beechwood-maple forest. C-. Det.: H Crum [Parmelia dubia]. Det.: Stanwyn G Shelter, 19 Jul 1958 [Parmelia bolliana]. Ver.: Barbara Moore, 19 July, 1968 [Parmelia bolliana]. Substrate: Corticolous.