Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a silicicolous species resembling U. virginis, with small (to 3 cm in diam.), monophyllous thalli which are whitish grey above and pale and hirsute below, apothecia plane at first finally with plicate discs, ascospores small, non-septate, hyaline; only known from Corsica and the Western Alps (France).
