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17-10-2025 18:45

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025.

23-09-2025 13:31

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

15-10-2025 16:39

Edvin Johannesen Edvin Johannesen

These tiny (0.2-0.6 mm), white, pulvinate apotheci

03-10-2025 13:44

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on Populus

13-10-2025 19:05

Louis DENY

Bonjour forumSur tronc décortiqué de feuillu x,

17-02-2013 21:11

Peter Welt Peter Welt

Jamoni, P.G. 1998. Un nuovo discomicete coprofilo

11-10-2025 20:27

Marcel Heyligen Marcel Heyligen

Found on a barked branch, 14 mm in diameter, of Ro

11-10-2025 14:20

Jean-Luc Ranger

bonjour à tous, Je ne vois pas comment l'on peut

09-10-2025 22:14

S. Rebecca

We just had the Bavarian Mycology Conference in Au

10-10-2025 00:49

Ethan Crenson

Hello all, This was found last weekend on a hardw

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gros Hymenoscyphus sur Fallopia japonica
Bernard CLESSE, 04-06-2016 21:30
Bernard CLESSEBonsoir à tous,

Voici un gros Hymenoscyphus trouvé à la base d'une tige pourrie de renouée du Japon (Fallopia japonica). Diamètre apothécie 3 mm. Longueur pied : 2 mm.

a) paraphyses cylindriques, très guttulées
b) asques à crochet à la base, très faiblement IKI+ ?
c) spores ellipsoïdes à subfusiformes, guttulées : 8,5-13x3-4

Une idée ?

Bernard
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Hans-Otto Baral, 04-06-2016 21:37
Hans-Otto Baral
Re : gros Hymenoscyphus sur Fallopia japonica
I suppose H. peruni which is on woody substrates but we had it on Fallopia too, near Trélévern by Brigitte in 2008.
Bernard CLESSE, 04-06-2016 21:50
Bernard CLESSE
Re : gros Hymenoscyphus sur Fallopia japonica
Great !

Indeed Zotto, the base of this stem of Fallopia japonica was almost woody!

Thank you for your opinion !

Bernard
Viktorie Halasu, 08-01-2022 11:22
Viktorie Halasu
Re : gros Hymenoscyphus sur Fallopia japonica
Hello Zotto,

I assume this is the same case of H. peruni? 
Large light yellow stipitate apothecia on Reynoutria stem.
Asci weakly IKI+b (in diluted Lugol!), H+. Paraphyses VB+ 3refr.
Long and slightly undulating hyphae on the surface on / below margin, VB+.  

Would you know whether the asci in type of H. peruni are amyloid or not? Svrcek (1985) did not write anything about amyloidity and in the 1989 paper he cited two recent colls., one weakly amyloid, the other inamyloid. 

Viktorie
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Hans-Otto Baral, 08-01-2022 11:54
Hans-Otto Baral
Re : gros Hymenoscyphus sur Fallopia japonica
I think so. Was it collected in sping/summer? I did not study the type of H. peruni, but this species may be amyloid (more frequent I think) or inamyloid. This must not mean that they are different species.
Viktorie Halasu, 08-01-2022 12:08
Viktorie Halasu
Re : gros Hymenoscyphus sur Fallopia japonica
Oh, I forgot to write it - leg. 30.V.2021, Olomouc, Cernovirske slatiniste, Reynoutria stand in a clearing under power line. 
Thank you for both confirmations.