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09-12-2019 12:05


Bonjour cette colonie de pustules orange sur vieu

09-12-2019 21:35

William Slosse William Slosse

Yesterday I found this species on the underside of

18-11-2014 11:05

Stip Helleman Stip Helleman

Dear friends,is there anyone who has for me the ar

10-12-2019 12:44

Castillo Joseba Castillo Joseba

Del pasado domingo en madera sin determinarA ver q

10-12-2019 11:40

Adrian Carter

If you are interested in Chaetomium you can access

04-12-2019 13:01

Mirek Gryc

Hello everyoneI inform you in advance that this is

09-12-2019 12:12


Bonjour cette colonie de micro pustules noires l

09-12-2019 14:00

Pérez del Amo Carlos Manuel Pérez del Amo Carlos Manuel

Anamorfo sobre ramas sin identificar de restos de

08-12-2019 20:38



08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

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More fungi on Arundo donax
Enrique Rubio, 20-05-2016 19:20
Enrique RubioHi to all

This fungus forms subcuticular pseudothecia (¿?) under the periderm of stems of Arundo donax. These pulvinate and ostiolate ascomata, arranged in longitudinal lines, are singly or situated on small stromata with some other ones, 0.4-1.5 mm long, up to 0.15 mm high.

The 8-spored asci are cylindrical and I think they are bitunicate altough I can see maybe a small structure near the apex. The golden brown bi-cellular ascospores and the pseudoparaphyses are showed in the pics. I tough could be a Didymella or a close related genus, but I don't know a good genus for this collection.

Have you some ides for it?

Thanks again

  • message #42846
  • message #42846
  • message #42846
Jacques Fournier, 20-05-2016 19:39
Jacques Fournier
Re : More fungi on Arundo donax
Hpla Enrique,
not sure but your fungus looks like a Roussoella. If so the spores should be delicately longitudinally ribbed, it's difficult to see if the preparation is not very thin.
The smaller spores with broadly rounded ends would fit R. donacicola (Speg.) Ju, Rogers & Huhndorf which is common on this host. The slightly larger and more narrowly elliipsoid are less typical of this species and recall a  tropical species, R. chiangraina (in Phytotaxa 181(1), 2014).


Enrique Rubio, 20-05-2016 20:46
Enrique Rubio
Re : More fungi on Arundo donax

Hi Jacques

Fantastic! I feel you are right, although the faint striate ornamentation is hardly visible. But the rest of the generic characters fits well with this fungus.

Thanks a lot!