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30-03-2009 20:37

Gernot Friebes

Hello, on Saturday I found this pyrenomycet on

30-03-2009 19:10

Stip Helleman Stip Helleman

Bonsoir a tout, Has anyone for me the article abo

29-03-2009 18:14


Bonjour, L'article que je recherche est exacteme

29-03-2009 15:18

Gernot Friebes

Hello, here is my second pyrenomycet I found ye

29-03-2009 15:10

Gernot Friebes

Hello forum, it's my first post here and I'm st

29-03-2009 13:53

roman vargas alberto

Salut J'ai pensé que Geoglossum umbratile po

27-03-2009 18:53


Bonjour à tous Ma documentation limitée m'amè

25-03-2009 20:58

Pablo Chacón Pablo Chacón

Bonnes nuits. Aide pour commencer. J'ai trouv

25-03-2009 17:45

Eric Strittmatter

Bonjour à tous, un ami a trouvé cette anamorp

25-03-2009 10:33


Bonjour, On m'a apporté cette diaporthale sur f

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Hypoxylon rubiginosum?
Gernot Friebes, 30-03-2009 20:37

on Saturday I found this pyrenomycet on a branch of Fraxinus, together with Hypoxylon intermedium and Hypoxylon cercidicolum. At first I really was surprised about the striking yellow, somehow powdery interior of the stromata but after testing the KOH-extractable pigments (orange) and the microscopical features everything fits perfectly to Hypoxylon rubiginosum.

I have never seen such yellow colours within Hypoxylon rubiginosum so I would appreciate your experiences about this species!

Best wishes,

  • message #7287
Andrew N. Miller, 30-03-2009 21:14
Andrew N. Miller
Re:Hypoxylon rubiginosum?
Shameless plug:

Please see H. rubiginosum. I do remember the yellow color from my collections from the Great Smoky Mountains National Park (TN and NC), USA.

Jack Rogers also reports it in his collections:

Gernot Friebes, 30-03-2009 21:32
Re:Hypoxylon rubiginosum?
Hello Andy,

thank you for your response and for the links! Also Jacques Fournier mentions the yellow colour: but I've never seen a collection or a foto with such a striking color before.

Best wishes,

Andrew N. Miller, 30-03-2009 21:45
Andrew N. Miller
Re:Hypoxylon rubiginosum?
Opps! My apologizes to Jacques... his website is certainly much more informative than mine.

Sorry Jacques.

Jacques Fournier, 30-03-2009 22:19
Jacques Fournier
Re:Hypoxylon rubiginosum?
Hi all,
nice to see everybody sometimes agrees!
Bets wishes,