LICHALP

Thelocarpon citrum (Wallr.) Rossman

Syn.: Sphaeria citrum Wallr., Thelocarpon arenicola Vain., Thelocarpon herteri J. Lahm, Thelocarpon vicinellum Nyl.

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)

Note: an ephemeral species of disturbed habitats, with optimum near treeline; so far only reported from the Eastern Alps (Austria, Italy).