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Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
Urceolella sp. ?
Marja Pennanen,
10-10-2014 22:09
I found some tiny, 0,1-0,2 mm wide, white hairy ascomycetes on Salix leaves.
Sorry, I do not have a macrophoto, but hope microphotos are enough.
They remind macroscophically a bit Urceolella graddonii, which I have found a couple of times.
But the hairs are different, shorter and the lumen is only at the base.
The spores are about 5-7x2-3.
The asci are weak walled, easily breaking, 25-30x4-5 and IKI blue.
The hairs are up to 30x4 and KOH reactive.
So, this is near U. nivea, but without droplets at spores.
Any ideas?
Marja
Hans-Otto Baral,
11-10-2014 07:00
Re : Urceolella sp. ?
Hi Marja
interesting species! I think I see a central line in the glassy part, but am not sure. Raschle draws such a line in U. nivea, see below. Maybe you should test with IKI for ths line. KOH-reactive means glassy substance disappearing.
Would be good in any case to look for the croziers too.
Zotto
interesting species! I think I see a central line in the glassy part, but am not sure. Raschle draws such a line in U. nivea, see below. Maybe you should test with IKI for ths line. KOH-reactive means glassy substance disappearing.
Would be good in any case to look for the croziers too.
Zotto
Marja Pennanen,
11-10-2014 08:23
Re : Urceolella sp. ?
Dear Zotto,
thank you.
I have only about 5 fruitbodies and I collected them in a place, where I will propably not go this year. The mighty winter has given warnings, we had 10 cm snow a couple of weeks ago, but that melted away.
White hairy species has a tendency to fall badly in water (when they finally decide to go swimming ;) ) and this species seems to have weak walled asci, that empties the spores when pressed, but I will try to find out more. Come back later.
Marja
thank you.
I have only about 5 fruitbodies and I collected them in a place, where I will propably not go this year. The mighty winter has given warnings, we had 10 cm snow a couple of weeks ago, but that melted away.
White hairy species has a tendency to fall badly in water (when they finally decide to go swimming ;) ) and this species seems to have weak walled asci, that empties the spores when pressed, but I will try to find out more. Come back later.
Marja
Hans-Otto Baral,
11-10-2014 08:38
Re : Urceolella sp. ?
Maybe the fungus is overmature. When asci have an apical ring then they eject the spores through it. Yours mght be dead alread, and perhaps somewhat disintegrated.
Two days ago we had 25°C and much sun, in the morning already 15°. Now always rainy, but still warm.
Two days ago we had 25°C and much sun, in the morning already 15°. Now always rainy, but still warm.
Marja Pennanen,
11-10-2014 11:39
Re : Urceolella sp. ?
Hi Zotto,
overmaturity is a possibility.
I studied another. Now there were many proper asci. But croziers are hard to find.
The lumen can go higer and the hairs may be 40 long and asci 6 wide.
Could this be just young U. graddonii?
I add some photos here.
Marja
overmaturity is a possibility.
I studied another. Now there were many proper asci. But croziers are hard to find.
The lumen can go higer and the hairs may be 40 long and asci 6 wide.
Could this be just young U. graddonii?
I add some photos here.
Marja
Hans-Otto Baral,
11-10-2014 12:03
Re : Urceolella sp. ?
U. graddonii = U. salicicola is now U hirta I think.
No, this species is impossible.
And ypu are sure the glassy substance dissolves?
The croziers seem to be present, I think.
Zotto
No, this species is impossible.
And ypu are sure the glassy substance dissolves?
The croziers seem to be present, I think.
Zotto
Marja Pennanen,
11-10-2014 13:53
Re : Urceolella sp. ?
Hi Zotto,
species accepted names change rapidly.
Actually I'm not sure about that KOH reaction, eveif I have these photos before and after KOH.
I just did not use focus well. Hairs are still left. Got to check that, too.
Because of the weathers, I wish I was there ;) Here now +4 and misty.
Marja
species accepted names change rapidly.
Actually I'm not sure about that KOH reaction, eveif I have these photos before and after KOH.
I just did not use focus well. Hairs are still left. Got to check that, too.
Because of the weathers, I wish I was there ;) Here now +4 and misty.
Marja
Marja Pennanen,
11-10-2014 16:39
Re : Urceolella sp. ?
Hi.
I checked with the dry preparate by adding my old KOH.
I do not know the percentage anymore, because it has been crystallized a bit at the top of the bottle.
Anyway, the hairs exist still, but look different, not so glassy.
Marja
I checked with the dry preparate by adding my old KOH.
I do not know the percentage anymore, because it has been crystallized a bit at the top of the bottle.
Anyway, the hairs exist still, but look different, not so glassy.
Marja
Hans-Otto Baral,
11-10-2014 17:53
Re : Urceolella sp. ?
Yes, it is not clear. But the central channel is well visible in water. Perhaps you should a bit wash with water afterwards, maybe the contrast gets better.
Maybe you have Hyalopeziza pygmaea?
Maybe you have Hyalopeziza pygmaea?
Marja Pennanen,
12-10-2014 21:57
Re : Urceolella sp. ?
Hi,
so I studied yet another.
The hairs did not melt in KOH, but lost their lumen.
Ealier ones must have been affected by the cold, because the spores had now a couple of small droplets.
If this is a Hyalopeziza, it must be H. pygmaea.
Thanks Zotto.
Marja
so I studied yet another.
The hairs did not melt in KOH, but lost their lumen.
Ealier ones must have been affected by the cold, because the spores had now a couple of small droplets.
If this is a Hyalopeziza, it must be H. pygmaea.
Thanks Zotto.
Marja
Hans-Otto Baral,
12-10-2014 22:18
Re : Urceolella sp. ?
you mean lost the canal in the glassy part? Possbly only seemingly?
The glassymatrix remains in KOH?
The glassymatrix remains in KOH?
Marja Pennanen,
12-10-2014 23:18
Re : Urceolella sp. ?
Hi,
I just microscoped white hairy on another Salix leaf from the same place.
They were similar and now I saw, that the hairs were warted.
My luck to study the leaf, where these were in poor condition first.
It must be Hyalopeziza pygmaea.
How on earth did you determine this with all the wrong data?
Marja
I just microscoped white hairy on another Salix leaf from the same place.
They were similar and now I saw, that the hairs were warted.
My luck to study the leaf, where these were in poor condition first.
It must be Hyalopeziza pygmaea.
How on earth did you determine this with all the wrong data?
Marja