Lichens marins - Myriolecis hagenii (Ach.) Sliwa, Zhao Xin & Lumbsch morpho gregata

Myriolecis hagenii (Ach.) Sliwa, Zhao Xin & Lumbsch morpho gregata

Myriolecis hagenii (Ach.) Sliwa, Zhao Xin & Lumbsch morpho gregata

Lecanora hagenii var. hagenii (Ach.) Ach. forma gregata

Lecanora hagenii (Ach.) Ach. p.p.

Lecanora hagenii var. marina (Sommerf.) Th. fr.

Lecanora umbrina f. gregata Harm.

Lecanora umbrina f. gregata

Description

Thallus crustose, more or less smooth, very thin and inconspicuous or poorly defined, whitish, greyish. Apothecia often very numerous and tight against each other, very sessile but without clearly developed stipe, flat concave disc but sometimes a little domed in very dry weather, brownish, beige, sometimes with gray-blue tones, thin margin sometimes crenulate, dirty whitish. Spores simple, elliptical, 9-12 x 4.5-6 µm. Negative colored chemical reactions. Species occurring on wood or shelled trunks, in particular on wrecks of wooden boats. N.B. Species very differently interpreted by the authors, very similar (if not a simple form?) of Myriolecis (Lecanora) zosterae which occurs on wood or very humid woody remains in maritime environments, whose apothecia are larger and almost stipited.

Lecanora hagenii var. hagenii forma gregata sur Ã©pave en bois Diben 1
JoÃ«l QUERELLOU

Lecanora hagenii var. hagenii forma gregata sur Ã©pave en bois Diben 2
JoÃ«l QUERELLOU

Lecanora hagenii var. hagenii forma gregata sur Ã©pave en bois Diben 3
JoÃ«l QUERELLOU

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