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Dear Forum,On decorticated wood of Castanea,I foun
Heterosphaeria patella?
hannie wijers,
12-04-2018 19:31
a friend found on a spot where there are many Achillea millefolium I saw old stems of which she thinks it is Achillea. These stems are all covered with black frb. I did it under the bino. Measure of the spores 12-17x3-5 µm. Asci 80 µm with croziers at the end. Parafysen Setpated and with drops in it J- with Melzer. Both of us think of Heterosphaeria patella. Are we right?
Sincerely Hannie Wijers
Hans-Otto Baral,
13-04-2018 09:38
Re : Heterosphaeria patella?
I think so. The ascus tip reacts faintly red, perhaps you used Melzer? It should be deeply red.
The medulla should be very thick and gelatinised.
Some other species of Heterosphaeria exist which are not always easy to identify.
The medulla should be very thick and gelatinised.
Some other species of Heterosphaeria exist which are not always easy to identify.
hannie wijers,
13-04-2018 19:17
Re : Heterosphaeria patella?
Yes I used Melzer. Maybe sounds stupid, but what is the medulla? Thanks Zotto,
Groeten
Hannie
Groeten
Hannie
Hans-Otto Baral,
14-04-2018 08:02
Re : Heterosphaeria patella?
Medullary excipulum is the inner excipulum. The ectal excipulum is a brown globulosa in Heterosphaeria but very thin.
hannie wijers,
14-04-2018 19:37
Re : Heterosphaeria patella?
Zotto, do you mean this? The first the inner and second the outer side?
GroetenHannie
GroetenHannie
Hans-Otto Baral,
14-04-2018 20:37
Re : Heterosphaeria patella?
Hmm, it doesn't look as it should. But you don't have a razor blade? Near the margin the inner texture may look like this, but at the lower flanks it changes to intricate with gel, see below.
But the genus is very clear.
But the genus is very clear.
hannie wijers,
14-04-2018 20:44
Re : Heterosphaeria patella?
Hello,
I have a razor blade. I will look if there is a new one Thanks fot explaning
groeten
Hannie
I have a razor blade. I will look if there is a new one Thanks fot explaning
groeten
Hannie