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Byssoloma marginatum (Arnold) Sérus. Cf.

Synonyms:

Family: PILOCARPACEAE

Habitat: Oceanic zone

Description

   Thallus thin and not always distinct, 3-4 cm at its greatest length, continuous and a little mealy, greenish-white, pale greenish. Apothecia numerous, 0.3-0.6 mm in diameter, often grouped or aggregated, flat disc at first then quickly convex and even globose, dark gray-brown, blackish, black sometimes with blue reflections, lighter margin slightly prominent at the beginning then fading at the end. Young and fresh apothecia seem to rest on a small whitish cottony ring but this disappears in old apothecia. Hypothecium dark chocolate. Elliptical ascospores, 3-septate, 12-18 x 3-5 µm according to the literature; 11-16 x 4-5 µm according to our measurements. Conidia abundant, pyriform, 4-4.5 x 1.3-1.7 µm. No significant color chemical reactions. Rare species found in moss on tree bark in very humid areas.

N.B. The taxon presented here was found on the bark of a Populus, as it has crossed characteristics with other taxa of the genus we present it with the usual reservations.







Byssoloma marginatum Lannilien 1
Bernard BOUFFINIER



Byssoloma marginatum Lannilien 2
Bernard BOUFFINIER



Byssoloma marginatum Lannilien 3
Bernard BOUFFINIER



Byssoloma marginatum Lannilien 4
Bernard BOUFFINIER



Byssoloma marginatum Lannilien 5
Bernard BOUFFINIER



Byssoloma marginatum Lannilien 6
Jacques HAINE



Byssoloma marginatum Coupe apothécie KOH Lannilien 7
Jacques HAINE



Byssoloma marginatum Coupe apothécie Polarisation Lannilien 8
Jacques HAINE



Byssoloma marginatum Algue Lannilien 9
Jacques HAINE



Byssoloma marginatum Asque Bleu Coton Lannilien 10
Jacques HAINE



Byssoloma marginatum Asque Lugol Lannilien 11
Jacques HAINE



Byssoloma marginatum Spores KOH Lannilien 12
Jacques HAINE



Byssoloma marginatum Spores Rouge Congo Lannilien 13
Jacques HAINE



Byssoloma marginatum Spores KOH Lannilien 14
Jacques HAINE



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