Caloplaca saxicola Teloschistaceae
Caloplaca saxicola

Growth type placodioid
Chemical results: K+ crimson

Widespread but most frequent in eastern Britain on dry sheltered calcareous rocks, buildings and churchyard memorials.

Densely pruinose yellow or orange thallus, convex lobes short, splayed and often down-turned at tips. Apothecia usually abundant, crowded in centre of thallus, discs orange to brownish, paler margins becoming excluded. Asci 8-spored, the spores polarilocular, 11-14 x 5.5-7 Ám.

Similar: Caloplaca flavescens

Caloplaca saxicola
Studland Church and Athelhampton, Dorset. October 2012

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