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03-02-2026 20:44

Mycoparasite with irregular conidia

Zetti Mario

When I first saw this white mould on an Agaricus s

18-08-2025 15:07

pyrenomycete on dead parts of foliose liverwort from Norway

Lothar Krieglsteiner

Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

02-02-2026 21:46

Dark disc on Populus

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

02-02-2026 14:55

Lichénicole sur Lobaria

Andgelo Mombert

Andgelo Mombert

Bonjour,Sur thalle de Lobaria pulmonaria.Conidiome

02-02-2026 14:33

Lichénicole sur Peltigera

Andgelo Mombert

Andgelo Mombert

Bonjour,Sur le thalle de Peltigera praetextata, ne

31-01-2026 10:22

Lichenicole hypocreale

Michel Hairaud

Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

02-02-2026 09:29

Scutellinia hirta ? sur souche moussue

Bernard CLESSE

Bernard CLESSE

Bonjour à toutes et tous,Pour cette récolte de 2

01-02-2026 19:29

Lambertella sur Olea

Nicolas Suberbielle

Nicolas Suberbielle

Bonjour, Marie-Rose D'Angelo (Société Mycologiq

30-01-2026 22:49

Ã©ric ROMERO

éric ROMERO

Bonjour tous, Récolté dans les Vosges le 22/10/

31-01-2026 09:17

Small hairy discs on Castanea

Marc Detollenaere

Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

Karstenia clematidis (?) sur Clematis vitalba

Bernard CLESSE, 30-01-2018 18:04

Bernard CLESSE

Bonsoir à toutes et tous,

Trouvé récemment ce que je pense être des Karstenia clematidis sur grosse liane morte de clématite des haies (Clematis vitalba).

Qu'en pensez-vous ?

Bernard

Hans-Otto Baral, 31-01-2018 08:05

Hans-Otto Baral

Re : Karstenia clematidis (?) sur Clematis vitalba

It looks like K. idaei, but I do not know K. clematidis - did you compare the two species?

Bernard CLESSE, 31-01-2018 08:24

Bernard CLESSE

Re : Karstenia clematidis (?) sur Clematis vitalba

Hi Zotto,

Thank you for your message ! In fact, I am looking for a key of the genus Karstenia including Karstenia clematidis because I simply saw on the web the existence of this species on Clematis.

Would you have this key?

Thank you very much in advance!

Bernard

Hans-Otto Baral, 31-01-2018 09:44

Hans-Otto Baral

Re : Karstenia clematidis (?) sur Clematis vitalba

haha. No, I only have my key and it contains only what I know. Other keys I do not remember. It is not so simple to go after the substrate because K. idaei occurs on everything.

I read in Sherwood 1980 that the spores of clematidis are only 35-45 x 3-4, with 3-4 µm long cells.

Bernard CLESSE, 31-01-2018 11:28

Bernard CLESSE

Re : Karstenia clematidis (?) sur Clematis vitalba

OK Zotto, thank you for the information about K. clematidis !

I do not quite see the difference between K. macer and K. idaei. With the given information and pictures can we eliminate K. macer?

Bernard

Hans-Otto Baral, 31-01-2018 12:07

Hans-Otto Baral

Re : Karstenia clematidis (?) sur Clematis vitalba

I know macer with larger LBs and darker apothecia, but I know the species is variable, and maybe not all in my folder belongs to it. K. macer is also redescribed by Sherwood in the same paper. Spore 7-septate, this appears to distinguish it! Individual cells double length tha n width.

Bernard CLESSE, 31-01-2018 12:10

Bernard CLESSE

Re : Karstenia clematidis (?) sur Clematis vitalba

OK Zotto, thank you, it's perfect !

Bernard

Bernard CLESSE, 31-01-2018 15:57

Bernard CLESSE

Re : Karstenia clematidis (?) sur Clematis vitalba

Here are new pictures of spores, with 9-15 septa.

Bernard

Hans-Otto Baral, 31-01-2018 17:15

Hans-Otto Baral

Re : Karstenia clematidis (?) sur Clematis vitalba

yes, this is clear.

Bernard CLESSE, 31-01-2018 17:21

Bernard CLESSE

Re : Karstenia clematidis (?) sur Clematis vitalba

OK Zotto, thank you for your opinion !

Bernard