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24-08-2019 15:43

Mirek Gryc

Hello. Peziza badiofuscoides or P. plebospora? O

24-08-2019 14:43

Josep Torres Josep Torres

Hola.Un líquen sobre una roca caliza del pasado d

22-08-2019 17:34

Stefan Blaser

Dear All, This collection from Fagus has globose

23-08-2019 07:46

Josep Torres Josep Torres

Hola.Un muy diminuto hongo creciendo sobre unas ho

22-08-2019 21:26

Castillo Joseba Castillo Joseba

Del pasado lunes  en tronca caido de fagusEstaba

21-08-2019 20:42

Simon Kennedy

As the historical records are no longer available

22-08-2019 18:35

Georges Greiff

Dear all,I have been going through herbarium speci

22-08-2019 16:24

Stefan Blaser

Dear All, The following collection looks similar

05-01-2019 14:57

Edvin Johannesen Edvin Johannesen

These orange "jelly"-like apothecia grow at the ap

21-08-2019 17:04

Mirek Gryc

Hello Grew among the roots of Phragmites.Fruitbod

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Yellow Nectria (aff. pallidula?)
Edvin Johannesen, 18-01-2019 22:14
Edvin Johannesen
Dear all,

This nectriaceous species was growing erumpent on twigs of old, but living plum tree (Prunus). Ascospores measure ca. 13 x 4-6 microns, and become warted and 1-septate at maturity. Is this sufficient for identification or does it need further studies?
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Christian Lechat, 19-01-2019 06:20
Christian Lechat
Re : Yellow Nectria (aff. pallidula?)
Hi Edvin,

maybe your fungus is Bionectria. Vertical section through ascomatal wall could be very useful as well as the reaction in KOH and lactic acid. Please, check if there is an asexual state on the substrate or around the stromata, which should be clonostachys-like.

All the best,

Christian
Edvin Johannesen, 19-01-2019 11:36
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Thanks, Christian. Do you mean cotton blue or plain lactic acid (which I do not have)? What to look for? Do you have a good article on Bionectria? I have limited access to literature on the internet.

Best regards,

Edvin
Edvin Johannesen, 19-01-2019 13:47
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
The ascomatal wall appears two-layered; an outer yellow and an inner hyaline layer.  I have also tested iodine reactions. Neither Barals (alone) or Lugol after pre-treatment with 3% KOH gave any detectable staining.
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Edvin Johannesen, 19-01-2019 13:49
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Apart from a few structures associated with the ascomata, an anamorph is not evident. Do these images show clonostachys or is this something else?
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Christian Lechat, 19-01-2019 15:35
Christian Lechat
Re : Yellow Nectria (aff. pallidula?)
you should take a look at Schroers 2001 A Mponograph of Bionectria Studies in Mycology 46.

Regards,

Christian
Edvin Johannesen, 19-01-2019 15:38
Edvin Johannesen
Re : Yellow Nectria (aff. pallidula?)
Thanks, again. I will see if I have access. I am thinking now maybe B. ochroleuca, but need to check further.

Regards,

Edvin