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19-06-2024 17:52

Bernard Declercq Bernard Declercq

Dear all, I am looking for the description and ac

12-06-2024 22:08

Stip Helleman Stip Helleman

Dear all, a week ago this cushen formed species w

18-06-2024 14:07

Thierry Blondelle Thierry Blondelle

Bonjour,Récolte sur une brindille dans une tourbi

17-06-2024 12:00

Juuso Äikäs

A couple days ago I found some Mitrula fruitbodies

16-06-2024 16:47

Hardware Tony Hardware Tony

These apothecia directly growing on a resupinate,

16-06-2024 14:36

Josep Torres Josep Torres

Hello.An anamorph located in nature, on the surfac

15-06-2024 13:51

Thomas Flammer

Just downloaded the english Key for Tarzetta. I h

12-06-2024 07:41

Juuso Äikäs

Yesterday I found some white Mollisias growing on

08-06-2024 14:44

Louis DENY

Sur sphagnum sp dans la tourbière des Pîles à S

09-06-2024 19:34

Spooren Marco Spooren Marco

Hello, Does someone has a PDF of Von Arx"article

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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,