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Orbilia on Salix bark
Marja Pennanen,
30-06-2012 13:35
I've been scanning some Salix bark lying under a dead tree near my home for some years. Today I found a big Orbilia on them.
They can be 2 mm wide.
The C-formed spores are about 8-10x1+ (too narrow for my microscope) and the SB is propably quite short.
The asci are about 30-40x3 and paraphyses narrow without swollen top.
It's been raining a lot here and loads of for instance Orbilias can be found on logs lying on the ground. I seldomly collect them, because I have been concentrating on myxos lately.
But this seemed interesting for big size and light colour...
Marja
Raúl Tena Lahoz,
30-06-2012 16:02
Re : Orbilia on Salix bark
Before Zotto gives you an opinion I will try luck, Orbilia auricolor?
Kisses,
Raúl
Kisses,
Raúl
Hans-Otto Baral,
30-06-2012 16:26
Re : Orbilia on Salix bark
Hi Marjy
I can only agree, Raul, though this is a collective species with not clearly known limits. If there are any conidie this would be important. Also the margin in section. But auricolores agg. is o.k.
Zotto
I can only agree, Raul, though this is a collective species with not clearly known limits. If there are any conidie this would be important. Also the margin in section. But auricolores agg. is o.k.
Zotto
Marja Pennanen,
01-07-2012 00:24
Re : Orbilia on Salix bark
Hi Raul, Zotto,
O. auricolor did not come into my mind. I have found it before, but it was so very colourfully yellow.
I've noticed, that some of these Orbilias can vary in colour, but do they all?
Is it because this had not been in sun? Or maybe this had grown fast in the moist condition and has not met dry times-interesting.
I tried to catch conidias with no success this time.
Thankfully: Marja
O. auricolor did not come into my mind. I have found it before, but it was so very colourfully yellow.
I've noticed, that some of these Orbilias can vary in colour, but do they all?
Is it because this had not been in sun? Or maybe this had grown fast in the moist condition and has not met dry times-interesting.
I tried to catch conidias with no success this time.
Thankfully: Marja
Hans-Otto Baral,
01-07-2012 09:49
Re : Orbilia on Salix bark
We still do not know how important colour is. I have the impression that yellow auricolor grows more light-exposed and might be more tolerant to desiccation, but I mainly saw auricolor +/- whitish. Bright yellow auricolor I am still interested in.
In luteorubella/sarraziniana I thought until recently that colour is unimportant. But now we have two observations: luteorubella with reddish-orange colour seems to form Helicoon, that with pale pinkish colour Anguillospora. And a few days ago we got a collection with pale pink and bright orange apos densely intermingled: the two colour variants differed in spore porientation! Are they two species or not? Hmmm, I do not know.
Zotto
In luteorubella/sarraziniana I thought until recently that colour is unimportant. But now we have two observations: luteorubella with reddish-orange colour seems to form Helicoon, that with pale pinkish colour Anguillospora. And a few days ago we got a collection with pale pink and bright orange apos densely intermingled: the two colour variants differed in spore porientation! Are they two species or not? Hmmm, I do not know.
Zotto