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19-03-2019 17:12

Per Marstad Per Marstad

We have found this to day, on Betula pubescens.Ca.

18-03-2019 23:10

Patrice TANCHAUD

Bonsoir, récolte réalisée sous pins (seul coni

18-03-2019 19:41

Per Marstad Per Marstad

We have found this to-day, in Norway, ca. 1 mm in

18-03-2019 21:48

Ethan Crenson

Hello again,On the same branch as my previous post

17-03-2019 22:26

Ethan Crenson

Found yesterday in New York City.  Substrate is a

18-03-2019 12:06

Enrique Rubio Enrique Rubio

Hi to everybodyThese minute, white, sessile, pruin

18-03-2019 11:32

Peter Püwert Peter Püwert

Hi all, here I find no solution. Apos max. 1 x o,

11-03-2019 14:02

Elisabeth Stöckli

 Bonjour, Récolté sur branche morte de lierre

17-03-2019 21:38

Ethan Crenson

Hello all, In New York City yesterday I came acro

17-03-2019 10:12

Pintos Angel Pintos Angel

Good morning,  has anybody information about Nect

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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!