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Phaeographis dendritica  (Ach.) Müll. Arg.

Synonyms:

Family: GRAPHIDACEAE

Habitat: Oceanic zone

Description

    Thallus crustose, 2-4 cm across, thin, most often smooth and glossy, whitish, sometimes tinged yellowish or greenish. Apothecia lirellate, scattered all over the thallus, 1-3 x 0.3-0.5 mm, flat and at the same level as the thallus, wide, ends usually acute, seldom simple, straight or sickle or scimitar-shaped, most often feather bunch-like, dendritic or stellate, black, covered with white pruine; in perpendicular section true exciple black, continous below the hymenium. Ascospores, narrowly fusiform, brown, 5-9-septate, 30-40 x 6-9 µm. C-, K+ yellow > blood red, Pd+ golden yellow. Common, oceanic trends, ubiquitous on bark of deciduous trees. See Phaeographis smithii of which lirella are shorter and more immersed, ascospores 5-7-septate and above all, lirellae section shows a discontinuous exciple below. This species is sometimes parasited by Melaspilea lentiginosa that induces apothecia abortion.*







Phaeographis dendritica Brest 3
Joƫl QUERELLOU



Phaeographis dendritica Le Passage 2
Alain GERAULT



Phaeographis dendritica Brest 2
Joƫl QUERELLOU



Phaeographis dendritica Le Passage 4
Alain GERAULT



Phaeographis dendritica Brest 1
Joƫl QUERELLOU



Phaeographis dendritica Coupe apothƩcie Lugol Lostmarc'h 1
Jacques HAINE



Phaeographis dendritica Le Passage 7
Alain GERAULT



Phaeographis dendritica Vieux Brest 4
Joƫl QUERELLOU



Phaeographis dendritica Brest 5
Joƫl QUERELLOU



Phaeographis dendritica Brest 6
Joƫl QUERELLOU



Phaeographis dendritica Brest 7
Joƫl QUERELLOU



Phaeographis dendritica Asque K et eau Lostmarc'h 2
Jacques HAINE



Phaeographis dendritica Asque Bleu Coton Lostmarc'h 3
Jacques HAINE



Phaeographis dendritica Spores Eau et K Lostmarc'h 4
Jacques HAINE



Phaeographis dendritica Spores Lugol Lostmarc'h 5
Jacques HAINE



Phaeographis dendritica Spores Lugol Lostmarc'h 6
Jacques HAINE



Phaeographis dendritica Spores Bleu coton Lostmarc'h 7
Jacques HAINE



Phaeographis dendritica Coupe apothƩcie LandƩvennec 1
Jacques HAINE



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