spores

spores

micro

Tous les ascomes sont hypermatures

Bonjour Rubio,
H. syringaecolor n'est pas rare chez nous (Belgique), semble être hautement spécialisé sur feuilles de Fagus, a des spores en moyenne plus mince (rapport L/D plus grand) que votre collection et une guttulation plus régulière (deux guttules polaires et de maintes guttules très petites). Je n'ai jamais vu H. ombrophilaeformis mais je crois que ce nom est applicable ici.
Amitiés,
Bernard Declercq

Merci, Bernard pour ta réponse savante et rapide

Bernard is right, H. ombrophilaeformis is very similar to H. syringaecolor. I have seen H. omb. only a few times so I thought I know H. syringaecolor much better. On my DVD there is a find of "H. syringaecolor" on Fagus cupules, but also some on Fagus leaves. Now when I compare them I get some doubts about the cupule find. It has much more lipid in the broader spores, so it could well be ombrophilaeformis, though the spores are rather short (*(17-)19-22.5(-24.7) x 5.8-6.7 µm) while on my drawing of H. ombr. on Fagus branch from much higher altitude they are 21-28 x 6-6.5 µm. The spores on your photo, Enrique, are overmature I believe, therefore septate and with only a few LBs. So H. ombrophilaeformis would be a choice for the cupule specimens.
Zotto

Here the spores of the find on Fagus cupules

and here those from a recent find on Fagus leaves (H. syringaecolor)

Thank you, Zotto. Now, I understand well the differences for the two species.
My collection grews at Es Bordes, Vall d'Aran (Lérida) Spain, at de Pyrinean mountains (1300 m)

Do you know where is the original description by Svrcek of this species?

Svrcek - New or less known discomycetes. IV. Ceska 1977, 31(1):8-14
je l'envoie.
François

je vois sur le site du CABI une correction en Hymenoscyphus ombrophiliformis. Je pense que c'est justifié si l'on suit la recommandation du code, pour la voyelle de liaison (article 60G)
François