05-03-2026 10:07
Hulda Caroline HolteHello, I found and collected this species growing
07-03-2026 13:06
éric ROMERO
Bonjour tous, Sur cône d'épicea fortement imbu,
08-03-2026 14:05
Thierry Blondelle
Bonjour à tous,Sur 3 récoltes supposées de H. l
05-03-2026 16:30
François BartholomeeusenDear forum members, On the 2nd of February 2026,
06-03-2026 09:41
Alain GARDIENNET
Hi forum, I'm now looking for another reference c
?Rhytidhysteron on Olearia
Zuidland Peter,
19-01-2022 02:24
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
Hans-Otto Baral,
19-01-2022 07:46
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.
Pete
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.
Pete
Zuidland Peter,
22-01-2022 05:58
Re : ?Rhytidhysteron on Olearia
The yellow downy edge consists of mostly granular material and interwoven fibres/?hairs.
Pete
Pete
