U.S.A., Montana, Flathead, Going-to-the-Sun road along McDonald Creek, where north end of John's Lake trail meets the road. Approx. 10 miles NE of West Glacier, MT.
48.64085 -113.857582
48.6408501° N, -113.8575821° W
1000 meters
1000 m.
On Betula.
On young paper birch bark. Common. Det: J.W. Thomson 3/84 as L. subrugosa. Det: B. McCune 3/91 as L. circumborealis. Substrate: Corticolous.