Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a species with a grey to green thallus consisting of flat lobes which are c. 1 mm wide, attached by hairs to the substrate and paraplectenchymatic throughout, frequent apothecia, and submuriform ascospores; on acidic rocks or overgrowing mosses in or near streams; based on type from the U.S., it is widespread in the Holarctic region, including Western North America and Japan, and rarely occurs also in the Central European mountains, with a single record from the Eastern Alps (Austria).
