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Bacidia laurocerasi  (Delise ex Duby) Zahlbr.

Synonyms:

Family: RAMALINACEAE

Habitat: Oceanic zone

Description

    Thallus crustose, thin, smooth to minutely cracked, grey-whitish, pale grey-greenish, sometimes grey-greenish tinged blue when fresh. Apothecia usually numerous, scattered all over the thallus, 0.3-1 mm diam., sessile, plane with a concolourous margin, or slightly brown-purple (K+ dark brown purple under microscope) or slightly convex, margin inconspicuous, dark brown, brown-black when shaded, blackish in well-lit areas. Ascii 8-spored, 50-70 x 15-20 µm  according to our measures. Ascospores colourless, acicular, straight or slightly curved, or wavy (notably inside ascus), 7-15-septate, 35-80 x 2,5-4 µm according to the literature, 30-60 x 2.5-3 µm according to our measures. Photobiont: chlorococcoid. Chemical spot tests negative. Rare or understated, on weakly acid or alkaline barks of trunks, branches or twigs of trees in shaded oceanic woodlands and also in dense garden hedges. In the field, not to be confused with Lecidella elaeochroma of which the thallus is more yellow-greenish and usually C+ orange. See also  Bacidia biatorina of which the thallus is rougher and darker, ascospores larger, and the Northern species  Baciidia caesiovirens.*







Bacidia laurocerasi Huelgoat 3
Jacques HAINE



Bacidia laurocerasi BB Huelgoat 2
Bernard BOUFFINIER



Bacidia laurocerasi BB Huelgoat 1
Bernard BOUFFINIER



Bacidia laurocerasi BB Crozon
Bernard BOUFFINIER



Bacidia laurocerasi Apothécies Huelgoat 4
Jacques HAINE



Bacidia laurocerasi Asques Bleu Coton Huelgoat 5
Jacques HAINE



Bacidia laurocerasi Coupe Apothécie Bleu Coton Huelgoat 6
Jacques HAINE



Bacidia laurocerasi Coupe Apothécie Eau Huelgoat 7
Jacques HAINE



Bacidia laurocerasi Spores eau Huelgoat 8
Jacques HAINE



Bacidia laurocerasi Spores bleu coton Huelgoat 9
Jacques HAINE



Bacidia laurocerasi Crozon 1
Bernard BOUFFINIER



Bacidia laurocerasi Crozon 2
Bernard BOUFFINIER



Bacidia laurocerasi Crozon 3
Jacques HAINE



Bacidia laurocerasi Crozon 4
Jacques HAINE



Bacidia laurocerasi Crozon 5
Jacques HAINE



Bacidia laurocerasi Coupe apothécie Crozon 6
Jacques HAINE



Bacidia laurocerasi Spores eau Crozon 7
Jacques HAINE



Bacidia laurocerasi Crozon 8
Bernard BOUFFINIER



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