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20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

"Lasiosphaerioid"
Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Massarina on Corylus
Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

18-03-2026 13:09

Orbilia on Celtis occidentalis
Khomenko Igor Khomenko Igor

I recently examined Celtis occidentalis branches

17-03-2026 19:41

Pyréno sur branche morte de chêne
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

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Rutstroemia alni?
Juuso Äikäs, 05-11-2020 15:53
Previously I've thought that a brown cup like this growing on a branch is R. firma. However, this one's spores seem to be too wide for that species. 

This was growing on a well-decayed piece of branch of a decidous tree. The place was dominated by Alnus incana, so there's a good chance that is the host. I don't unfortunetely have the sample anymore.

R. alni seems to me like a promising candidate. 

Spore measurements:

(16.8) 17.8 - 20.1 (20.2) × (8.1) 8.3 - 8.79 (8.8) µm
Q = (2.1) 2.13 - 2.3 (2.4) ; N = 10
Me = 18.6 × 8.5 µm ; Qe = 2.2
  • message #65747
  • message #65747
Hans-Otto Baral, 05-11-2020 16:42
Hans-Otto Baral
Re : Rutstroemia alni?
Yes, I believe it also.