Observation 196054: Biscogniauxia atropunctata (Schwein.) Pouzar
When: 2014-12-04
No herbarium specimen

Notes: On decayed log, most likely Oak since this fungus is commonly known as Hypoxylon Canker of Oak, a disease of Oak Trees.

Proposed Names

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By: Roo Vandegrift (Werdnus)
2015-03-14 02:19:33 CET (+0100)

Discoxylaria! As far as I know, that’s never been reported north of Mexico — it’d be super cool if that’s what you’ve got! Have you checked out this paper?

Rogers, J. D., Ju, Y. M., & Gonzalez, F. S. M. (1995). Discoxylaria myrmecophila and its Hypocreodendron anamorph. Mycologia, 41-45.

If you do have a Discoxylaria, I’d love to see part of the material. We’ve recently started working on putting together a molecular phylogeny of Xylaria here, and it would be really lovely to have that unusual species as part of the study!

Roo, You never fail
By: Judi T. (AvidAmateur)
2015-03-14 02:04:45 CET (+0100)

to provide the most interesting resources for me. I always learn so much from your direction. Indeed, while checking out the one you provided here, I may have come across a clue to yet another fungus whose ID has so far stumped me. I even dragged the branch upon which it is growing home in hopes of getting some additional growth from these minute specimens (possibly the monotypic genus Discoxylaria)and more photos. But for now, thank you so much for taking the time to view this observation and my related one. Your expertise and willingness to share it are much appreciated.

By: Roo Vandegrift (Werdnus)
2015-03-13 07:00:52 CET (+0100)

Thanks for the information Judi! I have not seen this fungus before, either, but it looks like a cool one. Obs# 198612 does have much clearer photographs — I feel like the margins are a real give-away for all Biscogs, regardless of color, and this particular observation just doesn’t show them well. But 198612 does! Thank you for pointing that out.

There is a great technical description of this fungus here: http://mycology.sinica.edu.tw/...

White! Crazy.

Danny, I am so surprised
By: Judi T. (AvidAmateur)
2015-03-12 16:52:46 CET (+0100)

you have not seen the whitish/grayish (some say silver) transitional stage of this oak canker. It is all over the trees in my nearby oak-hickory forest. I was lucky enough to photograph the brown asexual stroma, and the whitish transitional stage that turns into the black sexual stage — the one you are probably most familiar with — of this fungus all at the same time. You can see those photos in a later observation I posted, # 198612. If you would like to read more about it you can find additional information and pictures in the Clemson University Cooperative Extension online reference I cited in that later observation( http://www.clemson.edu/extension/hgic/tyk01.html .) Additional information and photographs that may be of interest to you are also available through the Missouri Department of Conservation web site.

By: Danny Newman (myxomop)
2015-03-12 08:51:51 CET (+0100)

never heard of a white Biscogniauxia. what do you think, Werdnus?

Created: 2015-01-11 20:59:35 CET (+0100)
Last modified: 2015-01-11 20:59:45 CET (+0100)
Viewed: 66 times, last viewed: 2016-10-26 10:27:38 CEST (+0200)
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