24-11-2025 15:23
Arnold BüschlenHallo, auf einer offenen Kiesfläche am Rande ein
23-11-2025 11:16
Bohan JiaHi, I found small discs growing on dead stem of
21-11-2025 10:56
Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
21-11-2025 11:52
Jean-Luc RangerBonjour à tous, on voit toujours 2 espèces areni
Hymenoscyphus on Dryopteris dilatata
Chris Yeates,
17-10-2012 20:26
Recently 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
Hymdry0aa-0001.pdf
Hans-Otto Baral,
18-10-2012 11:11
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
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