Observation 21099: Pluteus pouzarianus group
When: 2009-05-17
Collection location: Saco, Maine, USA [Click for map]
No herbarium specimen


Copyright © 2009 Erlon Bailey
Copyright © 2009 Erlon Bailey
Copyright © 2009 Erlon Bailey

Proposed Names

29% (4)
Recognized by sight
30% (6)
Recognized by sight: Dark brown cap, with wrinkles, white gills,
Used references: David Arora, (MDM)
44% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Erlon (Herbert Baker)
2015-01-18 19:40:43 EST (-0500)

I’ve changed my mind. The chips are mixed wood. I think it is Pluteus cervinus. I’ve found several collections of this species in the same woodchips. Thank you.

Thank you
By: Erlon (Herbert Baker)
2013-11-12 00:39:04 EST (-0500)

I must have been reading an older paper, thank you for that information! Please keep us informed when the new species are named.

pouzarianus vs. pouzarianus group
By: Alfredo Justo (Fredo)
2013-11-11 12:40:06 EST (-0500)

For the time being I would use the name “pouzarianus group” for this collection, not P. pouzarianus. As far as we can tell P. pouzarianus only occurs in Europe.

There are at least seven closely related taxa in the pouzarianus complex, and all seem to have a preference for conifers and clamps in the pileipelis. Of the seven taxa only two have names available for them (pouzarianus and primus) the other five will soon be described as new species.

Ah Yes
By: Erlon (Herbert Baker)
2013-11-11 02:51:32 EST (-0500)

Thank you for posting that info, Alfredo. I knew McClatchie’s description didn’t mach what people were calling P. magnus, now I know why! Since P. pouzarianus s.s. is the only species in the P. pouzarianus group that grows on conifer, I think that’s what these are.

Pluteus magnus
By: Alfredo Justo (Fredo)
2013-11-07 09:12:39 EST (-0500)

In many places, including Mushroom Observer, there is a tradition to use the name Pluteus magnus for specimens belonging in the cervinus group with dark colored caps and relatively big basidiocarps. That is not what the original author described as Pluteus magnus.

The name Pluteus magnus as originally described by McClatchie (http://mushroomobserver.org/name/show_name_description/617) represents what we currently know under the name Pluteus petasatus. I have recently revised the type collection that is preserved the New York Botanical Garden (http://sweetgum.nybg.org/vh/specimen.php?irn=808623) and all morphological characters point to Pluteus petasatus.

Without microscopical data is very difficult to identify most Pluteus species, especially in the P. cervinus group. Considering the general aspect and habitat of this collection (coniferous wood chips) it could belong in the species-complex around P. pouzarianus, a look alike of P. cervinus but with preference for conifers and clamp-connections in the pileipellis. There are several species of this complex in Eastern NA, including some that will be described soon as new species.

Created: 2009-05-17 19:44:43 EDT (-0400)
Last modified: 2015-01-19 05:33:32 EST (-0500)
Viewed: 331 times, last viewed: 2017-04-17 09:39:14 EDT (-0400)
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