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16-06-2019 12:07

Riet van Oosten Riet van Oosten

Hello, Found by Theo Westra, 13-06-2019 (The Neth

16-06-2019 11:54

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.Here is a Hymenoscyphus species growing on b

14-06-2019 15:32

Malcolm  Greaves Malcolm Greaves

A small group of Perithecia on rotten (salix?) woo

14-06-2019 09:40

Per Marstad Per Marstad

I have found this in Norway, on hardwood, laying o

14-06-2019 06:40

Django Grootmyers

What is this parasite of Cantharellus minor? Found

11-06-2019 01:49

Valencia Lopez Francisco Javier

Hola amigos...Adjunto fotos de unas supuestas Para

11-06-2019 00:32

Elisabeth Stöckli

Bonsoir, Sur feuilles de ronce (Rubus/roncier à

11-06-2019 16:20

Garcia Susana

Hola, He recolectado este asco sobre estiercol, c

12-06-2019 22:42

Ethan Crenson

Hello all, A friend noticed these tiny fruiting b

11-06-2019 00:08

Ethan Crenson

Hello all, I found a few of these tiny black cush

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Stalked yellowy cup
Malcolm Greaves, 01-10-2018 16:46
Malcolm  Greaves
Can someone point me in the right area for this yellow/orange stalked cup. It was on a small branch under Fraxinus and Salix. No hairs but almost striate outer surface. No sign of bluing with meltzers and the spores are 13.5 x 4.5.

Thanks

Mal
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Hans-Otto Baral, 01-10-2018 16:58
Hans-Otto Baral
Re : Stalked yellowy cup
This could be Hymenoscyphus consobrinus, but the spores are too unsharp to see welll their contents, and usually this species has an amyloid ring in Lugol.

The paraphyses should be figured (in living state) and also the ascus base checked for croziers.
Zotto
Malcolm Greaves, 01-10-2018 22:00
Malcolm  Greaves
Re : Stalked yellowy cup
Thanks Zotto. I have tried to get better photos showing the relevant details. There seems to be no reaction in the asci with lugol but the paraphyses which are granular did look to develop a slight brown streak. I have shown the base of the asci but again not sure whether it shows a crozier.

Thanks again.

Mal
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Hans-Otto Baral, 02-10-2018 07:34
Hans-Otto Baral
Re : Stalked yellowy cup
Are your pics in Congo red or in another red stain?

Nothing is alive anymore there. But one image shows a splendid crozier. The third pic looks much like a simple-septate ascus, though, maybe only because the other septum is hidden?

When testing iodine, the surrounding, especially the cytoplasm, should take a yellow-brownish colour, otherwise I would say there isn't enough iodine to provoke a reaction.
Zotto