Observation 177331: Pluteus chrysophlebius (Berk. & M.A. Curtis) Sacc.

When: 2014-09-07

Collection location: Ricketts Glen State Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

On beech.

Cap surface is wrinkled/textured.

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Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Okay, I should have another month…
By: Dave W (Dave W)
2014-09-09 00:08:31 CDT (-0400)

when the small Pluteus types are available.

This one dried very well. Dehydrated stipe is a golden brown color.

Hi Dave
By: Alfredo Justo (Fredo)
2014-09-08 20:32:30 CDT (-0400)

If you want to wait to get additional specimens and send them all together that is totally fine


I’ll send the mushroom, Alfredo.
By: Dave W (Dave W)
2014-09-08 18:31:03 CDT (-0400)

Do you think it’s important to receive the material soon? If not, I’ll see if I can gather additional similar specimens. There seems to be a good cross-section of these small yellow/brown Pluteus at the collections site (Rickett’s Glen), and I frequently visit this site.

Thanks, Alfredo…
By: Drew Parker (mycotrope)
2014-09-08 16:44:57 CDT (-0400)

for the clear explanation.

By: Alfredo Justo (Fredo)
2014-09-08 16:15:29 CDT (-0400)


if you can send the specimen over I will have a closer look,


rugosidiscus vs. chrysophlebius
By: Alfredo Justo (Fredo)
2014-09-08 16:14:15 CDT (-0400)

Yes, based on morphology alone Minnis & Sundberg did not considered the variation in colors (with green hues in rugosidiscus / yellow without green in chrysophlebius) to be important enough to separate both taxa.

In our first phylogenies of Pluteus we were able to obtain molecular data from one collection of mycologist Richard Homola considered by the author to represent P. rugosidiscus (i.e. with green on the pileus)

In the molecular analyses this collection is the sister taxon to all collections of P. chrysophlebius. You can check the phylogenies here:


It remains to be seen how “good” of a character is the color of the pileus to separate chrysophlebius and rugosidiscus morphologically, but molecularly they are two different things.

By: Drew Parker (mycotrope)
2014-09-08 15:37:34 CDT (-0400)

In Minnis & Sundberg (2010), P. rugosodiscus is listed as a synonym of P chrysophlebius. You apparently disagree. Would you elaborate?

I don’t recall whether or not…
By: Dave W (Dave W)
2014-09-08 14:46:23 CDT (-0400)

there was green on the stipe. The textured cap surface seemed interesting.

The material has been dried and is available for study.

By: Alfredo Justo (Fredo)
2014-09-08 13:06:05 CDT (-0400)

were there any green hues on the pileus (specially around center)?

If yes, then this could be P. rugosidiscus. It could also very well be P. chrysophlebius.

Created: 2014-09-08 00:11:41 CDT (-0400)
Last modified: 2014-09-08 12:11:38 CDT (-0400)
Viewed: 63 times, last viewed: 2017-06-18 20:16:33 CDT (-0400)
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