19-05-2026 10:27
Patrice TANCHAUDBonjour, récolte récente sur terre retournée i
04-06-2026 10:50
François Freléchoux
Bonjour, J'ai trouvé hier un petit asco observé
04-06-2026 07:02
François Freléchoux
Bonjour, Voici la description d'une espèce qui p
04-06-2026 13:34
Gernot FriebesHi,I am interested to hear your opinion on this Le
04-06-2026 11:36
Gernot FriebesHi,found on Vaccinium myrtillus.Asci: IKI –, 8-s
22-05-2026 13:29
Gernot FriebesHi,I am curious to hear your opinion on this mater
18-10-2022 00:12
Valencia Lopez Francisco JavierHola amigos/asRecientemente encontré esta colecci
?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
