
11-06-2025 16:26
Hi everyone, I am looking for the following protol

11-06-2025 13:44

Bonjour,J'ai trouvé cette espèce aux alentours d

09-06-2025 10:32
Elisabeth StöckliBonjour,Trouvé sur une branche morte et décortiq

09-06-2025 16:36

As far as I know, this species has yet to be assig

08-06-2025 18:03
Bonjour à tous, Une récolte alpestre discrète
Erysiphe quercicola on Quercus robur
B Shelbourne,
04-11-2024 22:58
• Several Erysiphe species with similar chasmothecial appendage morphology.
• This seems to be Erysiphe quercicola, chasmothecial appendages no longer than the diameter of the central body, downy patches amphigenous, and leaves not disfigured.
Habitat: Many leaves of Quercus robur with medium to large downy patches, on both sides of leaves, leaves not deformed, some small brown patches (may not be related), with Acer campestre and Crataegus cf. monogyna, around a hedge between a field and road, part of a large area of agricultural land being 'rewilded' (Knepp Estate), Low Weald, southern England, early November.
Chasmothecia: Apparently amphigenous, gregarious, initially yellow, then orangish, finally blackish.
Low magnification (20-40x): Chasmothecia sub-globose to globose, when mature with shortish appendages protruding from the equator, bases uninflated, apices appearing almost capitate due to a ball of dense branching, conidiophores not observed, some whitish lumps on mycelium.