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Small white ascomycete on Schoenoplectus
Enrique Rubio,
26-08-2020 12:50
Hi to everybodyThese small white and subsessile ascomata 0.2-0.3 mm diameter grew gregariously on Schoenoplectus (Scirpus) stems.
The IKI b (Calycina-type) asci have croziers. It has non-lanceolate filiform paraphyses, with a slightly enlarged obtuse apex containing some small refractive VBs (arrowed). The marginal hairs are very inconspicuous and they are made by two or three short cells with a short, subacute terminal element.
I want to think in a Psilachnum species or even a Calycina (turgidella, ellisii...) but this collection doesn't seem to adapt well to anything I know.
Do you have any ideas that could help me?
Many thanks again
Hans-Otto Baral,
26-08-2020 13:00
Re : Small white ascomycete on Schoenoplectus
Hi Enrique
could you send me the pics by mail so I could see the micros in better resolution?
Zotto
Hans-Otto Baral,
26-08-2020 16:31
Re : Small white ascomycete on Schoenoplectus
Now it is clear: The Helotium microspis complex. Look in Pezizellaceae, Calycellina. Here in the large-spored folder.
Zotto
Enrique Rubio,
26-08-2020 16:41
Re : Small white ascomycete on Schoenoplectus
Thanks a lot, Zotto.
Enrique Rubio,
26-08-2020 16:46
Re : Small white ascomycete on Schoenoplectus
Could someone scan for me regarding Calycellina microspis in Fungi of the Hebrides Dennis, page 142?
Chris Yeates,
26-08-2020 19:18
Re : Small white ascomycete on Schoenoplectus
It isn't there on that page Enrique! Might it be there on a different page under a different name?
Enrique Rubio,
26-08-2020 19:35
Re : Small white ascomycete on Schoenoplectus
Hi Chris
I'm sure I've been confused.
The text with Dennis's combination in Calycellina was in Trans. Bot. Soc. Edinb., 150th anniversary supplement 45(3): 213 (1989) [1988]
I'm sure I've been confused.
The text with Dennis's combination in Calycellina was in Trans. Bot. Soc. Edinb., 150th anniversary supplement 45(3): 213 (1989) [1988]
Chris Yeates,
26-08-2020 20:28
Re : Small white ascomycete on Schoenoplectus
I have a couple of PDFs from that journal - but unfortunately not that one :(
saludos, Chris
Enrique Rubio,
26-08-2020 20:43
Re : Small white ascomycete on Schoenoplectus
Thank you for your efforts, Chris!
Eduard Osieck,
26-08-2020 21:02
Re : Small white ascomycete on Schoenoplectus
The first page of the paper can be seen free of charge ...
Eduard
Hans-Otto Baral,
26-08-2020 21:53
Re : Small white ascomycete on Schoenoplectus
Here is what Dennis 1956 made, it is the basis for my identification.
Dennis-1956-p.-180-181-H.-turgidellum-microspis-0001.jpg
Enrique Rubio,
27-08-2020 00:10
Re : Small white ascomycete on Schoenoplectus
Thank you Chris, Eduard and Zotto
I find it hard to admit that the fungus I asked about is really Karsten's Peziza microspis with spores 6-8 x 1.0-1.5, which also says that asci "apice iodo no tinctae", although later Dennis seems to admit that the minute pore is blued by Melzer's reagent.
Everything seems too confusing...
I find it hard to admit that the fungus I asked about is really Karsten's Peziza microspis with spores 6-8 x 1.0-1.5, which also says that asci "apice iodo no tinctae", although later Dennis seems to admit that the minute pore is blued by Melzer's reagent.
Everything seems too confusing...
Hans-Otto Baral,
27-08-2020 08:10
Re : Small white ascomycete on Schoenoplectus
You are right, and I am also convinced that there exist several species. But I think that they are closely correlated and that H. microscpis could be the smaller spores variant with a low oil content in the spores. So yours I would name Calycellina aff. microspis. One of them could also be H. turgidellum, I do not see a clue to get more clarity without a very detailed type study. But dennis studied the types of both and a British record. The sketches are both from the type and I see a minute dot at the ascus apex in both sketches.