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23-06-2018 19:29

Thorben Hülsewig

Hi there, last week i found this anamorph on rott

24-06-2018 18:40

Andgelo Mombert

Bonsoir,Je suis en train de travailler un lachnum

22-06-2018 18:10

Jan Knuiman

Hello,Yesterday I found these discomycetes with a

23-06-2018 17:35

Nicolas VAN VOOREN Nicolas VAN VOOREN

Here is a very small Helotiales growing on rotting

24-06-2018 03:37

M Jonathan M Jonathan

Je sais qu'il manque des info, mais il est si dist

12-06-2016 23:19

Björn Wergen Björn Wergen

Hi there,today I was in Freibourg (Black Forest) f

08-06-2018 17:05

Pascal RIBOLLET

Bonjour,Trouvé sur vieux Diatrypaceae, environ 25

10-12-2013 16:45

Garcia Susana

Hi all Found these apothecia growing on old wood

23-06-2018 14:31

Castillo Joseba Castillo Joseba

en madera de abetoA ver que os pareceSaludosJoseba

22-06-2018 16:24

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Je pense avoir trouvé P

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Encoelia fascicularis (?)
Ethan Crenson, 29-05-2018 17:39
Hello all,

I found this in the Northeastern US (Southern Vermont) yesterday.  It is on Populus.  Peniophora rufa is present on the same branch.  I believe P. rufa grows exclusively on P. grandidentata and P. tremuloides . The fruiting bodies are .5 - 1.5cm, brown and emerging in clusters from gaps in the bark.  The outer surface of the smaller ones have fine white hairs.  Asci IKI negative, 104-124 by 10-11µm.  Spores 12-16 by 3.5-4µm, curved.  Ectal excipulum textura globulosa.  Medullary excipulum textura intricata.  Paraphyses enlarged at the tips, perhaps slightly brown (?) approximately 4µm wide.

I'd be happy to provide any additional information if anything is missing here.

Thanks in advance,

Ethan
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Hans-Otto Baral, 29-05-2018 18:13
Hans-Otto Baral
Re : Encoelia fascicularis (?)
Yes, it looks so. The genus has changed, it is now Sclerencoelia fascicularis, because Encoelia furfuracea is very distantly related, and this one belongs in Sclerotiniaceae.

There is, however, a North American species on Populus, S. pruinosa. We know it, e.g., from a recent collection by Joey Tanney from Quebec, on Populus grandidentata or P. tremuloides.

It has abundant crystals, probably therefore the name, but crystals occur also in S. fascicularis. I am not sure about a certain record of that species in America.

Zotto
Ethan Crenson, 29-05-2018 18:33
Re : Encoelia fascicularis (?)
Thank you, Zotto.  The "abundant crystals" of S. pruinosa are the fine hairs on the outside of the fruiting body, or something else?
Hans-Otto Baral, 29-05-2018 21:11
Hans-Otto Baral
Re : Encoelia fascicularis (?)
Nono, I mean octaedric crystals. maybe I see very small ones on your excipulum, but when you look at Tanney's photos they are striking (folder Sclerencoelia in Sclerotiniaceae on my homepage).
Joey JTan, 01-06-2018 03:40
Re : Encoelia fascicularis (?)
Last weekend I collected what is likely S. fascicularis on a dead Populus tremuloides branch still attached to a living tree. The branch was covered in S. fascicularis apothecia as well as Valsa sordida pycnidia; it was quite impressive, at least until my dog destroyed the specimen that I brought back with me (at least she waited until I had taken photos).

Yesterday I took my dog for a walk and found a nice specimen of S. pruinosa on the bark of a dead Populus tremuloides tree. Macroscopically, the apothecia are quite smaller than S. fascicularis, more densely coated in crystals (it looks like they are sprinkled with salt), and when dry they are inrolled and appear triangular or clam-like. From my few observations of these species, it seems that S. fascicularis is on dead branches and S. pruinosa on the bark of dead trees... maybe S. fascicularis is a branch endophyte that sporulates after branch death while S. pruinosa causes sooty bark canker? Sclerencoelia fascicularis apothecia are also erumpent from the branch and appear in clusters (fascicular) whereas S. pruinosa apothecia are gregarious but not in such distinct clusters.

I will moisten my S. pruinosa specimen, which is out of the dog's reach, and try to take better photos tomorrow.
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Hans-Otto Baral, 01-06-2018 07:08
Hans-Otto Baral
Re : Encoelia fascicularis (?)
Hi Joey!
I fully agree with your hypothesis, I think it is also what is known about S. pruinosa being the caus of a canker. And with "bark" you mean trunk bark, because all Sclerencoelia species grow on bark. 

Your last pic refers to S. pruinosa?
Zotto
Joey JTan, 01-06-2018 20:13
Re : Encoelia fascicularis (?)
Yes the bark on the trunk of the tree, not the branches. The last picture is of S. pruinosa - I just took some rather poor low-res pictures now, but you can see the crystals and some hydrated apothecia.

I will have to keep an eye out for sooty bark canker symptoms on living trees, because I have only noticed the apothecia on dead trees with the bark already sloughing off. In my area (eastern Canada), Entoleuca mammata is the major canker-causing fungus on poplar, whereas sooty bark canker is apparently the most important poplar canker in western Canada.
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Hans-Otto Baral, 01-06-2018 21:21
Hans-Otto Baral
Re : Encoelia fascicularis (?)
O.k., this is impressive!