Observation 203594: Diatrype virescens
When: 2014-01-19
No herbarium specimen

Notes: Growing on dead stick in a mostly hardwood forest
host: American beech (Fagus grandifolia)

Proposed Names

53% (1)
Eye3 Eyes3
Recognized by sight
Used references: Tom Bigelow posted a photo on facebook w/ this ID. Looks identical

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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The previous message …
By: zaca
2015-05-04 11:25:05 CDT (-0500)

was not addressed to me, but I’ll give my opinion.
The present classification of Graphis is made on the basis of several features, many of then only available at a microscopic level. Someone interested can give a look to the paper, referenced below, containing a world key for the genus. The main ingredients are:
Labia striation (yes/no), excipulum carbonization (3 degrees: apical, lateral or complete), hymenium (clear/inspersed), ascospores (muriform/transversally septate)
where only the first one can be recognized from photos (but you will need close-ups). Next you will need other features, like: chemistry and ascospore size.
Summarizing, only one of the features mentioned can be infered from a photo.
To help with the classification the key also presents several “lirellae-morphs”, which are related with the morphological characteristics:
Lirellae emergence, existence or not of a thalline margin, lirellae branched or not, size of the lirellae, disc exposure, labia or disc pruinosity.
The problem is that in several cases the same morphology correspond to distinct microscopic features.
In the case under evaluation, I think we can say that:
- The lirellae are (emergent to) prominent;
- A thalline margin is lacking, or if it exists is at a basal level;
- Some lirellae seem to have the disc partilly exposed and with some pruinosity (need a closer photo to see in detail);
but this don’t give rise to a “lirellae-morph”, there are several.
Finally, better photos could help, but still then we will be far away from an identification.
Last but not least: Very nice specimen and photo; Congratulations, Jimmie.

Reference:
Robert LÜCKING, Alan W. ARCHER and André APTROOT
A world-wide key to the genus Graphis (Ostropales: Graphidaceae)
The Lichenologist 41(4): 363–452 (2009)

Jason Hollinger/lichen experts
By: Jimmie Veitch
2015-05-03 21:41:20 CDT (-0500)

is it possible to ID any “Graphis sp.” lichen I find without microscopy?

Thanks
-Jimmie

Host:
By: Jimmie Veitch
2015-05-03 14:47:47 CDT (-0500)

American beech (Fagus grandifolia). And I’d guess the nearby black lines are a Graphis sp.

Host?
By: Byrain
2015-05-02 14:01:54 CDT (-0500)
so dope.
By: Richard and Danielle Kneal (bloodworm)
2015-05-01 23:49:39 CDT (-0500)
Incredible! Astounding! Amazing …
By: Judi T. (AvidAmateur)
2015-04-29 21:02:31 CDT (-0500)

and absolutely wonderful. I want to find some of that!!! Awesome “find” and great photo.

I’m in love
By: Danny Newman (myxomop)
2015-04-29 19:11:56 CDT (-0500)

Created: 2015-04-29 18:30:45 CDT (-0500)
Last modified: 2015-05-03 21:49:07 CDT (-0500)
Viewed: 251 times, last viewed: 2017-03-18 08:23:18 CDT (-0500)
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