15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
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Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
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Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
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Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903
Sobre rama muerta de Quercus, puede ser Helminthosporium quercicola?gracias por la ayuda
Hi Angel,
Difficult to distinguish H. quercinum, H. quercicola and H. microsorum only with asexual morph.
Alain
PS Very nice picture !
I wrote quercicola instead of quercinum. I have some immature ascomata and by the sexual morph at the moment I can not identify it.
Thanks again.
Regards
Angel
On which Quercus species? On Quercus ilex in all cases examined we have only seen H. microsorum.
Best, Hermann
Regards
Angel
Asexual morph sporulate in culture?
Thanks Hemann
Regards from
Mallorca
It did not sporulate in our cultures on MEA; however, we didn't try other media. According to our experience the asexual morph is not uncommon but sometimes difficult to see; often there are just slight elevations of the bark, and very commonly the conidiophores grow densely above the ascomata (likewise also in H. quercinum). So it is always a good idea to look beyond elevated bumps bearing fascicles of conidiophores. The ascospores are very diagnostic, by the wavy outline of the inner wall.
Saludos,
Hermann