Umbilicaria decussata (Vill.) Zahlbr.

Umbilicaria decussata (Vill.) Zahlbr.

Syn.: Gyrophora decussata (Vill.) Zahbr., Gyrophora discolor Th. Fr., Gyrophora ptychophora (Nyl.) Nyl., Lichen decussatus Vill., Omphalodiscus decussatus (Vill.) Schol., Umbilicaria ptychophora Nyl., Umbilicaria reticulata (Schaer.) Carestia ex Bagl. & Carestia

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 nival belt (above the lower limit of perennial snow and glaciers)

Note: an arctic-alpine to boreal-montane, circumpolar lichen found on steeply inclined to slightly underhanging surfaces of wind-exposed siliceous rocks; widespread throughout the siliceous Alps.

Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Switzerland: Bern; Graubünden; Uri; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Isère; Savoie; Haute-Savoie; Italy: Veneto; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta;

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