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Tanja Böhning
Hello, I found this very small (ca 0,5mm) yellow
Pirottaea imbricata?
Petra Eimann,
02-08-2022 15:27
Hi all, this find is from 19.03.2022 on herbaceous stems. Spores 7-9 x 1,7-2,2. hook+ IKI+ I think it could be Pirottaea imbricata, but I'm not entirely sure.
Thanks in advance for your help!
Petra
Hans-Otto Baral,
02-08-2022 16:27
Re : Pirottaea imbricata?
Hallo Petra
ich glaube nicht dass es P. imbricata ist. Die Haare wären dort deutlich dickwandig, oft nur lateral/apikal. Ich denke eher an einenArt wie P. senecionis.
Zotto
Michel Hairaud,
02-08-2022 16:38
Re : Pirottaea imbricata?
Hi Petra,
Are pictures 5 and 6 from the very same collection ? They look different to me, may be because of diffrent cameras ? .
The hairs you show are not black enough to belong in Pirottaea .
AmitiésMichel
Are pictures 5 and 6 from the very same collection ? They look different to me, may be because of diffrent cameras ? .
The hairs you show are not black enough to belong in Pirottaea .
AmitiésMichel
Petra Eimann,
02-08-2022 17:25
Re : Pirottaea imbricata?
Hallo Zotto, vielen Dank für deine Einschätzung. Verstehe ich es richtig das es auf jeden Fall eine Pirottaea ist und dann ventuell P. senecionis? Leider habe ich keinen Schlüssel um die Merkmale zu vergleichen. Kannst du mir eine Info geben woher und von wem es einen Bestimmungsschlüssel gibt?
LG Petra
LG Petra
Petra Eimann,
02-08-2022 17:28
Re : Pirottaea imbricata?
Hi Michel,
all pictures are taken with the same camera. Shots 5 + 6 are from a different location on the same substrate.
LG Petra
all pictures are taken with the same camera. Shots 5 + 6 are from a different location on the same substrate.
LG Petra
Michel Hairaud,
02-08-2022 17:36
Re : Pirottaea imbricata?
I cannot see on picture 6 the type of hairs specialized on Pirottaea. Mind you ! I may also mis inetrprete..
I am sending to your mail box a pdf of the basic (but stillvaluable) Nannfeldt monograph
Zotto may have a better (more recent key) . I would then also benefit from it -:)
Michel
I am sending to your mail box a pdf of the basic (but stillvaluable) Nannfeldt monograph
Zotto may have a better (more recent key) . I would then also benefit from it -:)
Michel
Petra Eimann,
02-08-2022 17:59
Re : Pirottaea imbricata?
Hi Michel,
thank you very much for sending this key. I will try to determine the species. As it is my first Pirottaea, I do not yet have any possibilities for comparison within the genus. I hope I will come to a result.
LG Petra
thank you very much for sending this key. I will try to determine the species. As it is my first Pirottaea, I do not yet have any possibilities for comparison within the genus. I hope I will come to a result.
LG Petra
Hans-Otto Baral,
02-08-2022 21:16
Re : Pirottaea imbricata?
No, I do not have a key other than Nannfeldt's. And I must say that I never advocated the separation into Pyrenopeziza and Pirottaea.
I admit the hairs are a bit thinner-walled than usual but I would still searhc this in Pirottaea, though I could be wrong.
In any case, I would prefer livin material for comparison.
If you compare my folder imbricata you will easily see that it cannot be that species.
Pirottaea is not easy, by the way, nor is Pyrenopeziza.
Zotto
Michel Hairaud,
03-08-2022 09:55
Re : Pirottaea imbricata?
I do agree with this conclusion (Pirottaea is not easy, by the way, nor is Pyrenopeziza) but how pleasant they are to look after !
Please, Petra, do not give up !
Michel
Please, Petra, do not give up !
Michel
Petra Eimann,
04-08-2022 13:03
Re : Pirottaea imbricata?
Hello,
here is a photo of the host. It could be Fallopia japonica, Fallopia sachalinensis or Impatiens glandulifera. I will try to identify the Pirottaea according to the key. It is a pity that there is no classification according to substrate as with some other genera.
LG Petra
here is a photo of the host. It could be Fallopia japonica, Fallopia sachalinensis or Impatiens glandulifera. I will try to identify the Pirottaea according to the key. It is a pity that there is no classification according to substrate as with some other genera.
LG Petra
Peter Püwert,
04-08-2022 15:01
Re : Pirottaea imbricata?
Hi,
no Fallopia, looks like Impatiens.
Hans-Otto Baral,
04-08-2022 21:01
Re : Pirottaea imbricata?
Yes, Impatiens. Some species of Pyrenopeziza and Pirottaea are not at all host-specific, so a substrate key is not of much use, keys based on the host I only like as synoptic key. When putting too much emphasis on the host, one is mislead to disregard morphology too much.