Laccaria - a closer look

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Chris Yeates
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Laccaria - a closer look

Post by Chris Yeates » Sun Oct 01, 2017 11:16 am

Hi
perhaps this will be followed by further thoughts, but as a preliminary contribution here goes. Laccaria as a genus is far from as simple as the common field guides might suggest.

I recently collected a Laccaria in damp ground (moss/Juncus) clearly in association with Salix caprea (image attached).
Laccaria pumila 0a.jpg
There is considerable confusion when referring to 2-spored Laccaria species (though L. tortilis is relatively straightforward), with the names striatula/pumila/lateritia/fraterna/ohiensis et al. bandied about in various books and papers. My collection fits well with Orton’s description of L. striatula as his spore dimensions are there or thereabouts.
TBMS 1960-p.282.jpg
The BMS checklist points that name (as used in the UK) to L. pumila which is what I am currently calling it.
Fayod’s original description, however: http://www.librifungorum.org/Image.asp? ... m17-13.jpg refers to a fungus with spores 12-18µm diameter!

I contacted Dr Jerry Cooper, a one-time fellow Yorkshire mycologist friend who is now doing stirling work in New Zealand. His preliminary work on Laccaria in NZ can be downloaded here:http://www.funnz.org.nz/sites/default/f ... ccaria.pdf His collections of L. pumila are on pages 16 and 17. He comments as follows:
"Your collection looks like mine.
Nobody has sorted this one out. It needs a sequenced epitype.
There are currently three groups in GenBank labelled L. pumila. One is nonsense and is near L. laccata var pallidifolia and I bet wasn’t even 2 spored. Then there are two groups within a clade with L. montana, and with material from Greg M. That makes more sense. One of these is probably the real L. pumila. One group is north American. Mine is in the other group along with material from France. I’d say it was a better candidate for the real version. Like yours mine has smaller spores than it should.
Greg M[ueller] talked about L. pumila in the attached paper with massively variable spore measurements.
I’d stick with your name.
"
A relevant bit of Mueller's paper referred to above can be seen here:
Lacpum Mueller1.jpg
I suspect that the Laccaria fraterna of Fungi of Switzerland vol. 3 and described as occurring in wet places with Salix and Alnus is also L. pumila as here understood; in this country we tend to use the name L. fraterna for the 2-spored fungus found (exclusively?) with Eucalyptus in parks and gardens.

I would encourage others to have a good look at Laccaria species they might find, especially those growing with Salix or Alnus in damp areas. The old attitude of "it's The Deceiver we can name it in the field" might be a bit suspect - I very nearly fell for it myself in this case :oops: .

Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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Chris Johnson
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Re: Laccaria - a closer look

Post by Chris Johnson » Mon Oct 02, 2017 6:47 am

Nice work Chris, food for thought ...

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Re: Laccaria - a closer look

Post by Flaxton » Mon Oct 02, 2017 7:25 pm

Certainly worth looking out for Chris.
Mal

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Re: Laccaria - a closer look

Post by Flaxton » Wed Oct 04, 2017 1:36 pm

Spent the morning under Salix of various sorts at the Arboretum and under one group three fruitbodies of Laccaria :D
Spores c8.5 two spored basidia :D :D :D then four spored basidia by the bucket load so this time just L laccata. :cry: I could have visited the eucalyptus towards the end of the Arboretum at least I know the two spored L tortilis grows there
Next time maybe.
Mal

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Re: Laccaria - a closer look

Post by Chris Yeates » Fri Oct 06, 2017 7:45 pm

Flaxton wrote:
Wed Oct 04, 2017 1:36 pm
. . . I could have visited the eucalyptus towards the end of the Arboretum at least I know the two spored L tortilis grows there
Next time maybe.
Mal
I think you mean Laccaria fraterna Mal . . . ;)
Flaxton wrote:
Wed Oct 04, 2017 1:36 pm
Spent the morning under Salix of various sorts at the Arboretum and under one group three fruitbodies of Laccaria :D
. . . .
I think the key thing is it has to be in wet ground as well - perhaps not the case in an arboretum?

Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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Re: Laccaria - a closer look

Post by Flaxton » Sat Oct 07, 2017 8:08 am

Oops. Yes should have been L fraternal. It was in a vey wet area.
Mal

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Re: Laccaria - a closer look

Post by Flaxton » Fri Oct 20, 2017 10:05 pm

Chris
On the Sphagnum raft on Strensall common a lot of Laccaria which I had looked at the spores of and concluded L laccata :oops: This time I looked a little closer. Two spored basidia spores mostly spherical some subspherical 8.5-10 small spores.
basidia.jpg
spores1.jpg
PA202548a.jpg
What do you think?

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