When: 2010-10-02

Collection location: Oneida Co., New York, USA [Click for map]

Who: Eric Smith (Magnavermis rex)

No specimen available


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Thanks much Walt and Irene
By: Eric Smith (Magnavermis rex)
2010-10-04 16:59:03 EDT (-0400)

for helping me to understand.

Can only agree with Walt,
By: Irene Andersson (irenea)
2010-10-04 10:44:36 EDT (-0400)
that trivialis seems to be a complex of species or at least forms. I have noticed two different ones in Sweden. One rather large and pale greyish brown-capped form that I have seen with aspen, and one smaller with a dark, but fading, olive coloured cap with hazel and/or oak.

It’s not impossible to find european species in New York, where there are many other kinds of mushrooms that are similar to ours in Europe.

Anyway, I’d settle with trivialis on this (even though it could represent a certain variety or form), after comparing DNA sequenses between some european and one american collection (Seattle, Washington) from Genbank:
They differ 1-2%, both between european collections, and between the american and the european ones.
I think it will be difficult to draw any definite lines between different species in this case.

Help requested from Irene and/or Dimitar
By: walt sturgeon (Mycowalt)
2010-10-04 09:17:46 EDT (-0400)

Once again we have a complex of simlar species. Your photo looks like what I find under Populus (aspen) trees in E. North America. Michael Kuo reports it is found under aspen in Western North America. Check the photos on this site for what folks are calling C, trivialis here. Maybe Irene or Dimitar can shed some light on the “real” C. trivialis.

I thought C. trivialis
By: Eric Smith (Magnavermis rex)
2010-10-04 06:03:25 EDT (-0400)

was strictly a European species.