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19-01-2022 02:24

Zuidland Peter

Hello all,I have found this erumpant only on Olear

21-01-2022 21:28

Romera Mariano

Buenas noches. Pongo dos fotos macros y unas cuant

19-01-2022 20:31

William de Jong

Hi,I found Hydropisphaera erubescens, I think, on

21-01-2022 19:03

Enrique Rubio Enrique Rubio

Could someone please send me the following documen

20-01-2022 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos.Subo unas fotos de un Saccobolus enco

22-12-2021 17:07

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte cortiquée de Quercus

21-01-2022 16:02

Pascal PEUCH

Bonjour, Je me suis lancé dans l'étude de cette

20-01-2022 20:24

hannie wijers

Hello, I  have a question and like some help. O

21-01-2022 13:02

Castillo Joseba Castillo Joseba

Me mandan el material seco, recolectada en planta

21-01-2022 12:40

Vasileios Kaounas Vasileios Kaounas

Dimensions 1-3 mm Found in rotten waste of Pistac

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?Rhytidhysteron on Olearia
Zuidland Peter, 19-01-2022 02:24
Hello all,
I have found this erumpant only on Olearia bush branches over the past few years and I would love some help to get to know what it might be. Might it be Rhytidhysteron?
Spores are hyaline, have up 1-3 septa with sizes 22-32.7 x 9.3-11.7um
Paraphyces: filiform, branching with undulating ends.
Asci: Lugol's -ve, Cr -ve. 

Victoria, Australia
Thanks Pete
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Hans-Otto Baral, 19-01-2022 07:46
Hans-Otto Baral
Re : ?Rhytidhysteron on Olearia
Rhytidhysteron has always brown spores. The apos lookk hairy, do they?

Would be good to get an idea of the excipulum (best in section) and the marginal hairs if there are some. Any KOH-extruding pigment?

The iodine reaction could be negative but I cannot see it for sure. Seems the apical ring does not expand on killing, but also this is not sure. Do you have immature dead asci on a photo?
Zuidland Peter, 22-01-2022 05:43
Re : ?Rhytidhysteron on Olearia
Many thanks for taking the time Hans-Otto,
It had been ID'ed as this genus and maybe Velutarina 1-2 years ago by Bjorn Wergen but only immature spores. I have been through your database and cannot find anything similar.
In the previous pics, other than Lugol's the mounting was in water.

KOH provides a reddish brown exudate.
I have a very limited supply of MLZ and in this case -ve.
Very poor images of excipulum, I hope you can make sense of the pics I send of what looks like some; sample was very poor to handle after rehydration.

Again many thanks for looking at this specimen.

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