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Caloplaca variabilis  (Pers.) Müll. Arg.

Synonyms:

Family: TELOSCHISTACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, usually circular, rather thick, rugose, cracked to areolate, dark grey, dark grey-brown, dull brownish, margin characteristically paler, dull whitish to pale grey, prothallus sometimes dark grey. Apothecia scarce to numerous and in that case distorted owing to compression, sessile, 0.5-1 mm diam., disc smooth, flat to slightly concave, dark brownish to blackish, tinged grey-blue because of a thick grey-blue persistent pruine, exciple entire, occasionally wavy, whitish. Ascospores ellipsoid, polarilocular, 1-septate, 14-18 x 7-9 µm, septum  3-5 µm. Thallus and apothecia K- or K+/- purplish-blue. Very rare in our prospection area, mainly found on dull and dusty calcareous rocks in fallow and waste lands. See Caloplaca alociza which is more thermophile, with a very thin thallus, smaller and not sessile apothecia, and less blue discs.







Caloplaca variabilis Sur rocher calcaire Ardenne 1
Jacques HAINE



Caloplaca variabilis Sur rocher calcaire Ardenne 2
Jacques HAINE



Caloplaca variabilis Corse Patrimonio 1
Bernard BOUFFINIER



Caloplaca variabilis Sur rocher calcaire Ardenne 4
Jacques HAINE



Caloplaca variabilis Sur rocher calcaire Ardenne 5
Jacques HAINE



Caloplaca variabilis Sur rocher calcaire Ardenne 6
Jacques HAINE



Caloplaca variabilis Asques et spores Ardenne 7
Jacques HAINE



Caloplaca variabilis Asques, spores et photobionte Ardenne 8
Jacques HAINE



Caloplaca variabilis Corse Patrimonio 2
Bernard BOUFFINIER



Caloplaca variabilis Corse Barbaggio 1
Bernard BOUFFINIER



Caloplaca variabilis Corse Barbaggio 2
Bernard BOUFFINIER



Caloplaca variabilis et Aspicillia calcarea Provence Esparron 1
Bernard BOUFFINIER



Caloplaca variabilis Provence Esparron 2
Bernard BOUFFINIER



Caloplaca variabilis Provence Esparron 3
Bernard BOUFFINIER



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