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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 (N.B. Apothecia of different shapes and different colors may be present on the same thallus)Epithecium purple in KOH and nitric acid. 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 2.5-4 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 Le Gouerest Roscanvel 1
Bernard BOUFFINIER



Bacidia laurocerasi Crozon 12
Bernard BOUFFINIER



Bacidia laurocerasi BB Huelgoat 1
Bernard BOUFFINIER



Bacidia laurocerasi BB Crozon
Bernard BOUFFINIER



Bacidia laurocerasi sur Grevillea Crozon 1
Bernard BOUFFINIER



Bacidia laurocerasi Spores Lugol Roscanvel 6
Jacques HAINE



Bacidia laurocerasi Asques Bleu Coton Roscanvel 5
Jacques HAINE



Bacidia laurocerasi Coupe apothécie écrasée Lugol Roscanvel 4
Jacques HAINE



Bacidia laurocerasi Coupe apothécie KOH Roscanvel 3
Jacques HAINE



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 Crozon 8
Bernard BOUFFINIER



Bacidia laurocerasi sur Berberis Crozon 1
Jacques HAINE



Bacidia laurocerasi sur Berberis Coupe apothécie KOH Crozon 2
Jacques HAINE



Bacidia laurocerasi sur Berberis Coupe apothécie acide nitrique Crozon 3
Jacques HAINE



Bacidia laurocerasi sur Berberis Asque KOH Crozon 4
Jacques HAINE



Bacidia laurocerasi sur Berberis Asque Lugol Crozon 5
Jacques HAINE



Bacidia laurocerasi sur Berberis Spores et paraphyses KOH Crozon 6
Jacques HAINE



Bacidia laurocerasi sur Berberis Spores KOH Crozon 7
Jacques HAINE



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