
10-09-2025 23:53

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Hola, encontre este estiercol de vaca estos apotec

03-09-2025 21:59
Philippe PELLICIERLa Léchère, Col de la Madeleine, alt 1970m, au s

07-09-2025 11:34

Hello,I have identified this fungus as Hymenoscyph

02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903

05-09-2025 09:32

Bonjour, hi everyone,Do you know where the fungari

The crater-like openings in the epidermis of the leaves are stunning under the microscope :-)
[EDIT]:
It was suggested that this corresponds better to Uromyces sp. due to the presence of aecia with pseudoperidium (Caeoma-aecia) that Melampsora euphorbiae usally lacks. See replies below.




no - Melampsora euphorbiae forms aecia (Caeoma type), the autoecical rust forms all 4(5) develompment stages on one host - compare for instance:
https://www.phytoparasiten.de/melampsora-euphorbiae-4/
Regards, Lothar



I will correct the title. I got a suggestion by Fabian Ernst of Uromyces tuberculosus which is cited to grow on E. peplus and E. exigua. I will seek further knowledge, but it is nice to learn new stuff here :-)
THANKS/

e.g.
https://bladmineerders.nl/parasites/fungi/dikarya/basidiomycota/pucciniomycotina/pucciniomycetes/pucciniales/pucciniales-incertae-sedis/aecidium/aecidium-euphorbiae/
I have an uprooted plant and two more, I will follow up. One of the plants is in its advanced state of infection so I will investigate further later on.

From what I read and learnt today, this would make my fungus Uromyces tuberculatus on the principle that Aecidium lacks completely the teliospore formation in its life cycle whereas U. tuberculatus grows specifically on E. exigua and forms verrucose teliospores.
However reading the host reaction (galling) of Aecidium euphorbiae on Euphorbia exigua, the symptms match perfectly to what I saw, thickened stems and leaves, erect growth, hypertrophy. Then, the same source (weblink above) says that U. tuberculatus rarely (does not) effects the host.
This makes things confusing, so unless we have double infection by two rust fungi (I think we can eliminate this possibility) the options are:
1. Uromyces tuberculatus but making an abnormal hypertropic reaction of the host OR
2. Aecidum euphorbiae but exceptionally is making teliospores on my sample.
I dont know what to choose between the two evils but 1 would be more realistic.


Yes we can conclude that this is Uromyces tuberculatus and that IT EFFECTS the host as explained above.
Great!