Observation 48566: Pluteus Fr.

When: 2010-07-12

Collection location: Akademgorodok, Novosibirsk, Russia [Click for map]

Who: Tatiana Bulyonkova (ressaure)

Specimen available


some micro shots and a compilation of traced shapes.
some micro shots and a compilation of traced shapes.
some micro shots and a compilation of traced shapes.
some micro shots and a compilation of traced shapes.

Proposed Names

76% (2)
Eye3 Eyes3
Recognized by sight
Used references: looked through Funga Nordica, British Fungal Flora, Flora Agaricina Neerlandica… nothing.
Based on microscopic features: not P. aurantiorugosus, definitely.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
interesting find
By: Johannes Harnisch (Johann Harnisch)
2011-02-11 08:26:59 JST (+0900)

May be it is an unsubscribed species?
Great Micro shots BTW must be using a good microscope?

Ended up with no variants at all
By: Tatiana Bulyonkova (ressaure)
2011-02-11 06:22:39 JST (+0900)

I finally managed to have a look at its microscopic features and turns out it’s not P. aurantiorugosus, not even close. The cuticle is basically a mat of interwoven long anastomosing hyphae with inflated terminal cells, while other bright yellow species’ surfaces either have protruding caulocystidia or are composed of rounded cells; its pleurocystidia have these funny inflated tips and cheilocystidia are rather small and mucronate, i.e. with pointed apices. Hyphae in the stipe surface are without clamps but instead there are a lot of bulges and branches, especially on the thinner hyphae.

I’m posting some pictures… almost desperate to find an answer but it’s worth a try.

This was the only specimen I’ve found so far. Our forests are full of different Pluteus species (a lot of rotting birch logs everywhere) and I’d certainly notice a large, yellow-orange one. It’s quite different from other yellow species which are common here, I mean P. leoninus and P. chrysophaeus, which have dingy brown tinges and are never so bright yellow orange.

Created: 2010-07-15 14:00:59 JST (+0900)
Last modified: 2011-02-11 08:38:36 JST (+0900)
Viewed: 73 times, last viewed: 2017-06-08 10:45:36 JST (+0900)
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