Accès membres

Mot de passe perdu? S'inscrire

17-04-2026 19:16

Small dark synnemata on rotten hardwood
Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Pyrenomycete with yellow subiculum on Aralia
Ethan Crenson

Hi all, A few weeks back a friend pointed out som

17-04-2026 15:14

sur feuilles de Luzula
Bruno Coué Bruno Coué

Bonjour.Récoltes du 16/04/2026, sur feuilles mort

12-04-2026 15:52

Anamorph on Salix
Gernot Friebes

Hi,I'm looking for help with this anamorph collect

14-04-2026 21:52

Thyriothecioid anamorph on Carex elata
Gernot Friebes

Hi,found on dead leaves of Carex elata. Conidia: 4

16-04-2026 22:09

Parorbiliopsis samarae?
Buckwheat Pete

Hello, I'd like to ask about this older specimen:

15-04-2026 19:33

Scutellinia cf. citrina
Fátima Durán Manzaneque

Hi!! I need help, I found this Ascomycete but I d

14-04-2026 20:31

Psilachnum lateritioalbum on Phragmites australis?
Gernot Friebes

Hi,can this be Psilachnum lateritioalbum on Phragm

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

12-04-2026 12:22

Unknown anamorph on Primula eliator
William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

« < 1 2 3 4 5 > »
Puccinia on Euphorbia cf maculata in the wild
Stephen Martin Mifsud, 11-10-2020 07:26
Stephen Martin MifsudHi. I found a patch of Euphorbia cf maculata infested with a phytopathogenic fungus, most probably a Puccinia, but which one is specific to the chamaesyce group (Euphorbia). I saw a similar pic og P. media on a Euphorbia sp. - is it the same? Also P. levata in hawaii (eupharbia too) is close

http://www.hear.org/pph/images/16_097.htm
Thanks and best regards
S.
  • message #65317
  • message #65317
  • message #65317
  • message #65317
  • message #65317
Björn Sothmann, 11-10-2020 09:03
Björn Sothmann
Re : Puccinia on Euphorbia cf maculata in the wild
Hi Stephen,

in (Central) Europe, there is just one rust on Euphorbias of Sect. Chamaesyce: Uromyces proëminens. That also fits the teliospores with one cell in your sample (Puccinia has two-celled teliospores, furthermore there are no Puccinia on Euphorbia in (central) Europe.).

Best,

Björn
Stephen Martin Mifsud, 11-10-2020 18:43
Stephen Martin Mifsud
Re : Puccinia on Euphorbia cf maculata in the wild
Many thanks Bjorne. Very interesting information and likely it is first record for Malta. I will mention you if something gets published of course. Strange that it was found in the wild (close to cultivated area).  Mycobank suggests to use the taxon Uredo proëminens DC :
 https://www.mycobank.org/page/Name%20details%20page/528007

I dont know if you have a preference re taxonomy.

Attractive pathogen! I will later share few better photos from the card of the other camera in this post.

Thanks again
Stephen
Björn Sothmann, 13-10-2020 10:37
Björn Sothmann
Re : Puccinia on Euphorbia cf maculata in the wild
Hi Stephen,

Uredo is usually used as a form genus for rusts that are only known in the uredial stage and which cannot be assigned to any of the proper rust genera like Puccinia, Uromyces etc.

All current literature that I have available like Klenke & Scholler, Gäumann, Termorshuizen & Swertz use Uromyces as the proper genus for rusts on Euphorbia.

Best,

Björn
Stephen Martin Mifsud, 14-10-2020 07:47
Stephen Martin Mifsud
Re : Puccinia on Euphorbia cf maculata in the wild
Thank you for your reply. You are right! 

Best regards
S.