LICHALP

Caloplaca crenularia (With.) J.R. Laundon var. crenularia

Syn.: Blastenia crenularia (With.) Arup, Søchting & Frödén, Blastenia ferruginea (Huds.) A. Massal. var. plumbea A. Massal., Caloplaca caesiorufa (Ach.) Flagey, Caloplaca festiva auct. non (Ach.) Zwackh, Caloplaca sbarbaronis B. de Lesd., Lichen crenularius With.

Lichenised.

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

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) 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 temperate to subtropical species found on horizontal to weakly inclined faces of a wide variety of siliceous rocks, very heterogeneous, and in need of revision. According to Vondrák (see Nimis 2016), records of C. crenularia from (sub-)alpine habitats belong to a still undescribed species (Blastenia psychrophila ined.), which is known from Veneto and Piemonte in Italy.