LICHALP

Xanthoria sorediata (Vain.) Poelt

Syn.: Caloplaca sorediata (Vain.) Du Rietz, Lecanora elegans (Link) Ach. var. sorediata Vain., Physcia elegans (Link) De Not. var. compacta Arnold ex Nyl., Rusavskia sorediata (Vain.) S.Y. Kondr. & Kärnefelt, Xanthoria elegans (Link) Th. Fr. subsp. compacta (Arnold ex Nyl.) Clauzade & Cl. Roux, Xanthoria scandinavica B. de Lesd.

Lichenised.

Substrate: calciferous rocks, intermediate rocks (such as calciferous schists), 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: a mainly arctic-alpine, circumpolar species found on steeply inclined to underhanging surfaces of exposed calcareous or dolomitic boulders, sometimes also of basic siliceous rocks; widespread throughout the Alps.