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06-09-2017 19:13

Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningGrowing on Equisetum arvense, in Bygdi

20-05-2020 17:29

Ibai Olariaga Ibarguren

Dear all,   I am struggling with a small pyreno

17-05-2020 12:03

Paz conde ita

Hi There This is a Scutellinia cf subhirtella, lo

20-05-2020 10:57

Mirek Gryc

Hello all.I found two collections of this genre ye

20-05-2020 05:34

Joop van der Lee

Since my findings of two Trichodelitschia species

18-05-2020 19:51

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte de Sambucus racemosa.

19-05-2020 11:33

Maria Plekkenpol

Hello, I just read the post from 18-05-2020 and I

19-05-2020 09:59

Joop van der Lee

When we are investigating characters of species un

18-05-2020 12:18

Valencia Lopez Francisco Javier

Hola a todos/asEncontré estas Pachyella sp, en un

17-05-2020 21:39

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Bonsoir, Sur branchette de Sambucus nigra, vers 8

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Stamnaria sp 270717
Miguel Ángel Ribes, 06-09-2017 19:13
Miguel Ãngel RibesGood evening

Growing on Equisetum arvense, in Bygdim lake, Norway, 1.057 m, together with Roseodiscus rhodoleucus and probably R. equisetinus. I saw "in situ" Roseodiscus, but not this Stamnaria, who grows latter, probably at home.

Macro: Cup-shape apos, white-cream to very light orange, semi-transparent, very long stipe, (1052,3) 1159,9 - 2148,4 (2149) × (317,6) 372,1 - 499,2 (521,4) µm; N = 9; Me = 1560,7 × 429,5 µm.

Asci cylindrical, 8-spores, uniseriate, with croziers, IKI+, (231) 231,2 - 245,1 (245,7) × (10,6) 10,7 - 11,5 (13,2) µm; N = 7; Me = 238,5 × 11,4 µm.

Spores broadly elipsoid, hialine, plenty of small guttules, (16,7) 17,3 - 20,3 (22,2) × (9,9) 10,5 - 12,1 (12,9) µm; Q = (1,4) 1,44 - 1,8 (2,2) ; N = 52; Me = 18,6 × 11,3 µm ; Qe = 1,6.

Ectal excipulum with textura porrecta, more prismatica near the margin, but covering with a slim layer of textura gelatinosa.

Medullar excipulum and subhymenium more or less with textura intricata.

I think the nearest species is S. urceolata, but very pale and with a very broadly elipsoid spores.

Thank you for your help.

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Hans-Otto Baral, 06-09-2017 19:42
Hans-Otto Baral
Re : Stamnaria sp 270717
Hi Miguel Angel!

superb collection, and I agree it is close to "urceolata" (which is now the true S. persoonii), but spores are too large. However - your ascus measurements are from dead asci because the width is just the same as for the spores. You did not see any turgescent asci? The spores look pretty good, i.e. they do not appear to be overmature, but in S. persoonii I saw them only 7.5-9 µm wide.

How much apothecia do you have? I am sure Danny Haelewaters would like to take a sequence.

Zotto
Miguel Ángel Ribes, 06-09-2017 22:25
Miguel Ãngel Ribes
Re : Stamnaria sp 270717
Hi Zotto

No, none living asci, and few spores, not overmature sure.

Now the collection is dried, but I remember at least more than 30-40 apos. Give me the addres of Danny and I will sent him some sample.

Thank's a lot.
Hans-Otto Baral, 07-09-2017 12:08
Hans-Otto Baral
Re : Stamnaria sp 270717
I will send you his address by mail. Thanks! First I will ask him.
Erwin Gruber, 20-05-2020 12:44
Re : Stamnaria sp 270717
Hi Miguel Angel and Zotto,

for sure this is Stamnaria persoonii which grows on dead Equisetum fluviatile as well as E. arvense. Shape of ascomata and other presented characters of the fungi are matching well, just spore Q is relatively lower than my average measurings.

Please do not use "Stamnaria urceolata", i do not know this name had ever been published, as i told Rene his specimen represented truly S. persoonii, so his working name was a needless synonym.

Best regards, Erwin
Erwin Gruber, 20-05-2020 13:55
Re : Stamnaria sp 270717
Miguel Angel, 
i got to add a minor correction to prior statements of mine: Your spore measurings leaded to greater sizes as mine, taken from types of S. persoonii and some other specimen. 
Perhaps your measurings gave larger sizes as you might have squashed ascospores while measuring. I noted such alteration by pressure while measuring spores of another kind of Stamnaria. Your average spore size is about 4 µ longer and wider than i measured, so this leads to lower Q which shall be close to 2,0.

A colleage at iNaturalist forum made some notes on Stamnaria arranged from my knowledge i shared. I will share this here for common use.
Erwin Gruber, 20-05-2020 14:42
Re : Stamnaria sp 270717
Some links to observations of Stamnaria and Horsetailes, mainly Equsetum hyemale with visible infection by the genus.

Stamnaria spp. mainly S. americana
Horsetails infected by genus Stamnaria

I
ndicating that S. americana and S. laetissima comb. ined. are way more frequent and widely distributed as thought, but hardly ever noticed despite presence.
Am curious how many species of Stamnaria will be proved to exist. I could gather lots of specimen from iNat users, just got no equipment for analyzing at home, and much to be done for my 1 person business in gardening.
Hans-Otto Baral, 20-05-2020 16:30
Hans-Otto Baral
Re : Stamnaria sp 270717
Ah, verstanden! Der erste Bericht schaut wie ein fake aus, unglaublich.
Erwin Gruber, 20-05-2020 20:09
Re : Stamnaria sp 270717
Dear Zotto, i am not sure to get the meaning of your latest comment "Der erste Bericht schaut wie ein fake aus"? Which report did you mean by that, one at iNat or something else?
Hans-Otto Baral, 20-05-2020 21:21
Hans-Otto Baral
Re : Stamnaria sp 270717
I meant the ring-shaped growth of the apothecia.
Erwin Gruber, 20-05-2020 22:08
Re : Stamnaria sp 270717
I got it, you meant the observation of Roseodiscus subcarneus