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02-11-2020 16:54

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur brindille morte au sol, à proximitÃ

02-11-2020 09:04

Enrique Rubio Enrique Rubio

Does anyone know if the connection between Hyponec

30-10-2020 20:59

Edvin Johannesen Edvin Johannesen

Growing on wet branch of dead deciduous tree. Exci

01-11-2020 23:15

Dirk Baert

Hallo,Ik heb deze Stemphylium spec. gevonden op de

01-11-2020 21:15

William Slosse William Slosse

Good evening everyone,on a dead petiole of Dryopte

01-11-2020 11:34

Blasco Rafael Blasco Rafael

Hola, conoce alguno de Ustedes este Anamorfo sobre

01-11-2020 08:56

Castillo Joseba Castillo Joseba

me mandan el material seco,  recolectada posiblem

30-10-2020 13:10

Stephen Martin Stephen Martin

Colonies chocolate brown, growing very slowly on a

30-10-2020 23:33

Edvin Johannesen Edvin Johannesen

Hi! I am wondering if this is Mellitiosporiella s

07-10-2020 23:24

Viktorie Halasu Viktorie Halasu

Hello,would anyone recognize this nice Hymenoscyph

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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.