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13-02-2020 00:11

Josep Torres Josep Torres

Hola.Imágenes tomadas el 2 de Febrero en la Repú

18-02-2020 22:32

Christine VALANCE

Bonjour, je sèche lamentablement sur cet asco tr

16-02-2020 18:00

Josep Torres Josep Torres

Hola.Especie fotografiada el 29 de Septiembre de 2

17-02-2020 22:31

Eric Bionne Eric Bionne

Bonjour à tous;Lasiosphaeria sur écorce de Fagus

17-02-2020 21:25

Enrique Rubio Enrique Rubio

Do you have some idea on this fungus with scutate

18-02-2020 08:53

Alain GARDIENNET Alain GARDIENNET

Hi forum, Have either of you ever observed the te

16-02-2020 16:48

Peter Thompson

Hello Everyone,I have found some pale yellowish re

17-02-2020 00:10

Valencia Lopez Francisco Javier

Hola a todos/asAdjunto algunas fotos de unos supue

17-02-2020 16:17

Björn Nordén

Hi!Can someone please tell me what this is? It has

16-02-2020 15:25

Riet van Oosten Riet van Oosten

Hello, Just a try :-) Found by Rene Hoogenboom,

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Rustroemia on ivy leaf
Charles Aron, 14-02-2020 18:19
Charles Aron

Hello everyone. My first contribution to the forum!


Below is a description of a cup fungus looking like a Rutstroemia which I found on a dead ivy leaf but I'm not aware of any of this genus which occur on this substrate.


Regards,


Charles.


Rutsroemia on ivy leaf, Refail Fields, Pentraeth, N. Wales, 11/2/19


Asci: 80x7, 87x8, 90x8, 87x8, 89x8, 87x8.5, 78x7, 90x8,


Spores: 12.5x4, 2x3.5, 12x3.7, 12x4, 13x4.8, 12x3.5, 12.4x3.7, 12x3.9, 12x4.,


Paraohyses tips: 4, 3.3, 3.5, 4,


Excipulum textura globosa-cells thick walled. C 10 across.


FB 3 x 2mm. Cup-shaped. Hymenium bright yellow-brown. Excipulum paler, minutely furfuraceous. Stipe short-c0.5mm.

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Raúl Tena Lahoz, 14-02-2020 18:27
Raúl Tena Lahoz
Re : Rustroemia on ivy leaf
Hi Charles, welcome to Ascofrance!
It is a Moellerodiscus, from the M. lentus complex. We found it also on ivy leaves in France and Spain. Asci seem to arise from croziers, do they?
Cheers,
Raúl
Hans-Otto Baral, 14-02-2020 18:30
Hans-Otto Baral
Re : Rustroemia on ivy leaf
Hi Charles

welcome to the forum!

Your fungus seems to be a Moellerodiscus, related to M. lentus. A difficult genus, not easy to give advice. It seems the asci arise from croziers, perhaps you can show this by a closeup on the ascus base? Did you test the ascus apex with iodine (Lugol)?

Zotto
Charles Aron, 14-02-2020 18:39
Charles Aron
Re : Rustroemia on ivy leaf

Many thanks for this. I'm not familiar with Moellerodiscus. So it would be fair to call it Moellerodiscus lentus agg.? Will have a look at the asci in iodine.


Charles.