LICHALP

Caloplaca arnoldii (Wedd.) Zahlbr. ex Ginzb. subsp. arnoldii

Syn.: Calogaya arnoldii (Wedd.) Arup, Frödén & Søchting, Caloplaca biatorinoides (Clauzade & Cl. Roux) Gaya, Caloplaca saxicola (Hoffm.) Nordin subsp. arnoldii (Wedd.) Clauzade & Cl. Roux, Caloplaca saxicola (Hoffm.) Nordin subsp. biatorinoides Clauzade & Cl. Roux, Physcia pusilla A. Massal. f. turgida A. Massal., Physcia pusilla A. Massal. var. lobulata f. minor Arnold

Lichenised.

Substrate: calciferous rocks, intermediate rocks (such as calciferous schists)

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: a well-distinct taxon of the extremely critical C. saxicola-complex; on steeply inclined calciferous rocks (limestone, dolomite, calcareous schists) in open habitats; certainly more widespread in the Alps.