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15-01-2026 15:55

Lothar Krieglsteiner Lothar Krieglsteiner

this one is especially interesting for me because

03-01-2026 15:36

éric ROMERO éric ROMERO

Bonjour, Pouvez-vous me dire quel est le nom à p

19-01-2026 12:01

Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España) 

17-01-2026 19:35

Arnold Büschlen

Hallo, ich suche zu Cosmospora aurantiicola Lite

16-01-2026 00:45

Ethan Crenson

Hi all, On decorticated hardwood from a New York

18-01-2026 12:24

Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

17-01-2026 10:41

Blasco Rafael Blasco Rafael

Hola, he descubierto que he creado una Pulvinula t

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

16-01-2026 11:20

Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España) 

10-01-2026 20:00

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

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Hymenoscyphus on Dryopteris dilatata
Chris Yeates, 17-10-2012 20:26
Chris YeatesRecently I have become very interested in the mycobiota of Pteridophytes (not only ascomycetes); while collecting at the same site where the 'Calloriella' was found - http://www.ascofrance.com/search_forum/16442? I found damp fronds of Dryopteris dilatata well populated by Allophylaria campanuliformis. There was also a Hymenoscyphus species (PDF attached) which while close to one of the many forms of H. scutula does not seem 'right', and as has happened before one wonders to what an extent the fungi which occur on ferns do not tend to overlap with those on angiosperms.
Distinctive features were the asymmetrical ascospores and the bead-like VB's in both paraphyses and marginal cells; occasionally there was an anomalous spore (one figured), presumably formed by the conjunction of one or more spores in the ascus.

As ever, any suggestions are very welcome.

Cordialement
Chris
Hans-Otto Baral, 18-10-2012 11:11
Hans-Otto Baral
Re : Hymenoscyphus on Dryopteris dilatata
Hi Chris

I wrote a comment yesterday but it got lost... Well, I though about H. virgultorum which is on woody substrates. There the many oil drops in the spores are all +/- small, while in scutula there are always some rather large LBs among the small ones. Yours looks more like the former. Croziers are absent in both species.

Zotto