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Lecidea fuscoatra (L.) Ach.

Synonyms:

Family: LECIDEACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, to 10 cm across, markedly areolate, areoles thick, 2-3 mm across, flat to convex, extending to thallus margin, glossy, brown-reddish, pale brown, fawn, grey-brown, prothallus black. Apothecia numerous, 1-2.5 mm diam., innate, disc flat to convex, black but often grey owing to dense pruine, exciple thin, concolourous, soon excluded. Ascospores ellipsoid, colourless, simple, 11-16 x 4,5-6,5 µm. Photobiont: Trebouxia. Cortex: C+ red, K-, KC-, Pd-. Slightly nitrophile, on siliceous rocks, common in Central Brittany and to a lesser extent on rocks near the seashore. N.B. Lecidea grisella Flörke is a sympatrical species in Brittany and notably in coastal areas. Its thallus is more rimose, less areolate except when old and towards the center. When existing, areoles are gradually thinner near margins, colour is more greyish and matt. Both species may grow together and sometimes are difficult to distinguish. When a black prothallus is present and well developed and the thallus overall colour very dark, see also Miriquidica deusta, most often sterile.*







Lecidea fuscoatra Commana 1
Alain GERAULT



Lecidea fuscoatra Commana 2
Alain GERAULT



Lecidea fuscoatra Kervijen
Bernard BOUFFINIER



Lecidea fuscoatra Roc Trédudon 1
Bernard BOUFFINIER



Lecidea fuscoatra Roc Trédudon 2
Bernard BOUFFINIER



Lecidea fuscoatra Plounéour-Ménez 1
Bernard BOUFFINIER



Lecidea fuscoatra Roc'h an Daol
Bernard BOUFFINIER



Lecidea fuscoatra Ardennes 1
Jacques HAINE



Lecidea fuscoatra Asques Ardennes 2
Jacques HAINE



Lecidea fuscoatra Paraphyses et spores Ardennes 3
Jacques HAINE



Lecidea fuscoatra Plounéour-Ménez 2
Bernard BOUFFINIER



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