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02-07-2025 18:45

Sur Osmunda regalis
Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 17:26

hymenoscyphus albidus
Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 09:32

Searching of a paper from The Mycologist
Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Septoria on Impatiens glandulifera
Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Help with a Pleosporal.
Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Black erumpent on Populus (Ascodichaenaceae?)
Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Pezizales --Pyronema?
Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

RECHERCHE ARTICLE
ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

is this a Hymenoscyphus on Nothofagus?
Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Scutellinia cejpii ?
Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

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Rhizodiscina lignyota ?
Ethan Crenson, 13-02-2023 17:30
Hello all,

I collected this two days ago on bare hardwood in New York City.  I was expecting to bring home the much more common Patellaria crassispora, but this is obviously not that. Can anyone confirm this is Rhizodiscina lignyota, or if not, point me in the right direction?  I have a vague idea that R. lignyota is fairly common in some places, but I have never found it in my neighborhood.

Spores are brown, one septate, smooth, 9-10.5 x 3.7-4µm

Asci bitunicate, clavate, very faintly IKI+ staining blue over much of the upper surface, 44-56 x 9-10µm

Paraphyses septate, slightly constricted at the septa, up to 4.3µm wide at the tips.

Excipulum textura angularis

Thanks in advance,

Ethan
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Hans-Otto Baral, 13-02-2023 18:51
Hans-Otto Baral
Re : Rhizodiscina lignyota ?
I see no objection to your ID. Abundant brown anchoring hyphae should be there, which gave rise to the name Rhizodiscina. The species is really common.
Ethan Crenson, 13-02-2023 18:57
Re : Rhizodiscina lignyota ?
Thank you, Zotto!  in my experience, here in the Northeastern US, it isn't all that common.  I have found the very similar Patellaria crassispora and (occasionally) P. atrata at least 70 times (I checked my records), but I have never seen Rhizodiscina until now. 

I will look for the anchoring hyphae for extra credit.