Small Brown Fungus

Please try to include photos to show all parts of the fungus, eg top, stem, and gills.
Note any smells, and associated trees or plants (eg oak, birch). A spore print can be very useful.
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Chris Johnson
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Small Brown Fungus

Post by Chris Johnson » Fri Nov 09, 2018 1:42 pm

Not getting anywhere with this one, found under mixed woodland (mainly beech), 3 weeks ago.
Cap 17mm
Gills arcuate, adnexed, L=48ish
Stipe 35 x 2mm
Small spores hyaline, smooth, 2.9-3.3 x 1.7-2.0, Q=1.7
Basidia 4-spored
Cheilocystidia abundant, mainly fusiform, one or two metuloid
Caulocystidia cylindrical in clusters

Any pointers welcome.

Regards, Chris
Attachments
Small-Brown-01.jpg
Small-Brown-02.jpg
Small-Brown-04.jpg
Small-Brown-06.jpg
Small-Brown-11.jpg

Flaxton
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Re: Small Brown Fungus

Post by Flaxton » Fri Nov 09, 2018 10:27 pm

Chris
Some of the cystidia look to have crystals at the top. The only groups I know with white spores and that form of cystida are Malanoleuca Strobilurus and Lentinus unfortunately none have spores so small.
Mal

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Re: Small Brown Fungus

Post by Chris Johnson » Sat Nov 10, 2018 8:56 am

Mal
Thanks for looking. Spent hours on this one :(
Regards
Chris

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Re: Small Brown Fungus

Post by mollisia » Sun Nov 11, 2018 10:58 am

Hello Chris,

this seems to be a very remarkable fungus, so it's worth spending even more time. I hope you keep an exsiccate?!

I admit that I don't have any clue to this up to now, but I have no books aroud me at the moment. But I will keept that in mind and have more looks on what genus it might be.

The combination of such small spores and metuloid cystidia is very striking and not know to be at the moment.

The fruitbody looks collybioid macroscopically, and the scurfy stem would make Tephrocybe a possibility. There are species with very small spores - but I don't know of any with metuloid cystidia. I'm not sure if they have cystidia at all ....

May be it would worth looking wether the spores are amyld and wether the basidia show siderophilic granulation. Clamps are present as is wonderful visible in the last foto.

best regards,
Andreas

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Chris Johnson
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Re: Small Brown Fungus

Post by Chris Johnson » Mon Nov 12, 2018 1:44 pm

Hello Andreas

Unfortunately I no long have the specimen.

Tephrocybe does seem to be a close fit but neither Funga Nordica nor B & K reference the genus. Moser is useful but no spores that small.

Regards, Chris

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Re: Small Brown Fungus

Post by Lancashire Lad » Mon Nov 12, 2018 2:34 pm

Hi Chris,

Don't know if you will have seen it already, but there is another Tephrocybe key in addition to Moser, that's available as PDF download if you have electronic access to BMS Journals: -

"The Genus Tephrocybe Donk in Britain, PD Orton. - Bulletin of the British Mycological Society - Volume 18, issue 2, pages 114-120.

However, that key too doesn't have any species with spores as small as yours.

(PM me an email address if you don't have electronic access).

Regards,
Mike.
Common sense is not so common.

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Re: Small Brown Fungus

Post by Chris Johnson » Mon Nov 12, 2018 7:59 pm

Hello Mike

Many thanks for looking into references.

I am a member of the BMS and do have electronic access, which I came to latterly.

Much appreciate your help.

Regards, Chris

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Re: Small Brown Fungus

Post by Chris Yeates » Mon Nov 12, 2018 8:43 pm

Lancashire Lad wrote:
Mon Nov 12, 2018 2:34 pm
Hi Chris,

Don't know if you will have seen it already, but there is another Tephrocybe key in addition to Moser, that's available as PDF download if you have electronic access to BMS Journals: -

"The Genus Tephrocybe Donk in Britain, PD Orton. - Bulletin of the British Mycological Society - Volume 18, issue 2, pages 114-120.

However, that key too doesn't have any species with spores as small as yours.

(PM me an email address if you don't have electronic access).

Regards,
Mike.
That Tephrocybe key is out of date really
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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