Observation 273673: Pluteus Fr.

Single basidiocarp growing among hardwood duff, hardwood leaf litter and pine needle litter near Fagus grandifolia, Quercus sect. Lobatae, Betula papyrifera, Pinus strobus and Acer saccharum. Cap finely scaly; 1.4 cm wide. Stem white with a bluish base that intensified during drying; 3.2 cm long; stem 0.2 cm wide. Pileipellis with filamentous elements arranged in fascicles perpendicular to the underlying surface.

Species Lists


Pileipellis in phloxine
Pileipellis in phloxine
Cheilocystidia along gill edge in phloxine

Proposed Names

29% (1)
Based on microscopic features: Pileipellis with filamentous elements arranged in fascicles perpendicular to the underlying surface
57% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: Image Sharer (image sharer)
2019-01-03 04:10:13 CST (-0500)

Any update?

Also, here is a species list that may lead to a name eventually:

By: Alfredo Justo (Fredo)
2017-04-06 09:03:04 CDT (-0400)

Hi Django,

Yes, I would take a look if you send this over


Added an image of the cheilocystidia
By: Django Grootmyers (Heelsplitter)
2017-04-06 01:48:23 CDT (-0400)

I was unable to locate any pleurocystidia on the the gill fragments I examined. Previously I had looked at a roman aqueduct section. I could look at more features of these but the dried fruiting body is very small and fragile and I don’t want to waste it. If you would be interested in examining this I have been putting together a box of my Pluteus specimens to send to you.

By: Alfredo Justo (Fredo)
2017-04-05 21:19:54 CDT (-0400)

If you still have the specimen give it another try. Morphology of the cystidia go a long way for getting closer to an ID in Pluteus

I was not able to locate any unambiguous cystidia on the gills
By: Django Grootmyers (Heelsplitter)
2017-04-05 13:01:31 CDT (-0400)

This may be due to my microscopy skills or lack of them rather than an actual lack of cystidia. They were at least not abundant.

By: Alfredo Justo (Fredo)
2017-04-05 10:24:23 CDT (-0400)

Hi Django,

I think it is worth checking the cystidia on this one. With the bluing of the stipe and the aspect of the pileus this might be Pluteus americanus

The elements of the pileipellis you show are a bit ascending, but I do not think they form a trichoderm/hymeniderm like in section Hispidoderma

Here http://mushroomobserver.org/93725 you can find a great example of what the pileipellis looks like in sect. Hispidoderma. The morphology of the elements is different depending on the species, but that is the general organization of the pileipellis that you find in the group.