Gray lichen id ? - Forum ASCOFrance

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Gray lichen id ?

Cvenkel Miran, 28-03-2015 00:07

On rock,Slovenia, patch size of mans hand or bigger. At first I thought this is single lichen (gray), but seems, looking on screen, there are two specieses. The color of gray is reproduced OK. The black patches on gray area are randomly scatered around and are rare. Size all about the same as the ones on magnification.

Cvenkel Miran, 28-03-2015 22:33

Re : Gray lichen id ?

I guess Acrocordia. Ref.:
http://www.irishlichens.ie/pages-lichen/l-303.html

Alain GARDIENNET, 29-03-2015 09:05

Re : Gray lichen id ?

Hi,

Here it's impossible without microscopy. Acrocordia is easily recognizable with ascospores.

Rock is calcareous ?

Alain

Cvenkel Miran, 29-03-2015 13:52

Re : Gray lichen id ?

It is calcerous. It is typical karst area.
See this image

Lepista Zacarias, 29-03-2015 14:43

Re : Gray lichen id ?

I don't believe this is Acrocordia. Species in this genus have big perithecia with visible ostiole by magnification of the photo, but what we see is an arthonioid apothecia.
Best wishes,
zaca

Cvenkel Miran, 29-03-2015 15:55

Re : Gray lichen id ?

Ok will get better photos next time. Lots of gray patches this size around there.

SYLVAIN ARD, 08-04-2015 16:02

Re : Gray lichen id ?

Ca me rappelle le Verrucaria calciseda mais je ne le garantirais pas, le groupe des lichens crustacés est très difficile.

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