25-04-2016 09:18
Steve ClementsBonjour, j'ai trouvé cet asco sur le bouleau –
20-04-2016 23:02
Bernard CLESSE
En pessière, sur sol argileux ± neutre. a) long
24-04-2016 08:58
Stephen Martin Mifsud
Dear friends, I have found an Albugo sp. on Convol
25-04-2016 09:34
Steve ClementsBonjour. Je ne suis pas sûr à 100% sur ce hyphom
24-04-2016 12:33
Angel Pintos
Hysterotecium erumpent-supericial, 1 to 1.5 mm lon
23-04-2016 00:34
Lepista ZacariasHello everybody,Same days ago I found a specimen s
Diatrype disciformis on Betula?
Steve Clements,
25-04-2016 09:18
This asco was on a birch twig, and looks like Diatrype disciformis from the microscopy. Spores were deposited as a pale brownish deposit, and were 6-8 x 1-1.5.
Asci were 8-spored, biseriate, tips blueing with Lugol (I think), 40-45 x 5 um.
Perithecia were multitudinous, without long necks.
Small ostioles dotted the stroma surface.
Ellis and Ellis state that this species is occasionally found on birch. I'm hesitant to call it Diatrype disciformis however, as the habit of growth is pulvinate and quite unlike D. disciformis as found on beech ie "erumpent through stellate fissures".
Steve
Alain GARDIENNET,
25-04-2016 21:13
Re : Diatrype disciformis on Betula?
Hi Steven,
And what about Diatrype bullata ? The stroma looks like to be convex.
Alain
Steve Clements,
25-04-2016 21:21
Re : Diatrype disciformis on Betula?
Yes it does look more like D. bullata - which I know quite well. I assumed it was confined to Salix. However in Fungi of Switzerland it is said to occur on other broadleaf species, not just Salix. So I think that this is a better fit for my specimen.
Many thanks,
Merci bien,
Steve