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21-03-2026 15:13

Lepista Zacarias

Hello everyone, Does any one know of any literatu

21-03-2026 22:59

Petr Soucek

Good evening, I would appreciate some advice on th

20-03-2026 12:53

Stefan Blaser

Hello everybody, In the field, from distance, my

20-10-2017 09:23

Garcia Susana

Este otro crecía en el mismo trocito de madera qu

20-03-2026 16:16

Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

Stefan Blaser

Hello everybody, I hope for some hints... Macro:

19-03-2026 17:50

Enrique Rubio Enrique Rubio

Hi to everybodyThese thiny, blackish pseudothecia

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Pleospora on Clematis
Björn Wergen, 24-11-2013 18:45
Björn WergenHi friends,

and again, there is an interesting pleosporaleous species growin on dead Clematis stems with distinct setae on the black, hemisphaerical pseudothecia and clavate, 7-8 septated ascospores, which have indistinct, hyaline appendages on both endings (upper ending with hemisphaerical, lower one with conical appendage).

Spores are 25-31x8-10µm, asci 100-130x15-20µm, short stalked and biseriate. I have also found conidial state of very small, beaked conidiomata with Stemphylium-like conidiospores of 14-19x7-9µm.

After comparing several species with Wehmeyer, I have the idea of Pleospora dura, which has tomentose hairs instead of the stiff setae I have recorded. Probably you can tell me something about the relation in Pleospora with their conidial states. In Wehmeyer 1961, P. herbarum is described as attended by Stemphylium state.

I think its time to read Wehmeyer's works...Pleospora is still undeterminable for me :(

[NFF = anamorph, HFF = teleomorph]

Thanks to everyone who can tell me something about it.

regards,
björn
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Björn Wergen, 24-11-2013 19:01
Björn Wergen
Re : Pleospora on Clematis
P. ambigua has many similarities, even if it is figured very different. Wehmeyer gives matching spore and ascus sizes and, more important, distinct stiff hairs and many substrates for this species.

He only describes the spores as "dark yellow brown to red brown"...
Alain GARDIENNET, 24-11-2013 20:09
Alain GARDIENNET
Re : Pleospora on Clematis
Hi Björn,
Perhaps have you to look towards Cilioplea species.
Alain  
Björn Wergen, 24-11-2013 20:30
Björn Wergen
Re : Pleospora on Clematis
Yes you are so right, its Cilioplea coronata...oh man diese blöden Ascomyceten immer ^^

:D Thanks Alain!

regards,
björn
Yannick Mourgues, 24-11-2013 23:55
Yannick Mourgues
Re : Pleospora on Clematis
Yes, Alain is right again !
Cilioplea Munk, Dansk Bot. Ark.15(2) : 113, 1953 is a genus that shows ascocarps with short apical setae.
I remember that C. kansensis have hyaline /yellowish setae and C. coronata brown setae. Here it's clearly C. coronata !
Beautiful discovery!