Observation 56210: Phylloporus arenicola A.H. Sm. & Trappe

When: 2010-10-19

Collection location: Diamond and Crater Lake, Oregon, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

These did not exhibit any bluing on the gills or flesh but they look a little too dark brown for P. rhodoxanthus. However the spores were too wide for the P. arenicola. Spores were approx. 10.0-12.2 X 5.1-6.0 microns.
That pretty much leaves me with P. rhodoxanthus.

Species Lists



Proposed Names

-18% (5)
Recognized by sight
31% (7)
Used references: Mushroom Expert
-15% (6)
Recognized by sight: notched, bright lemon-yellow, anastomosing gills.
Used references: Bessettes Big Book of Boletes
13% (5)
Recognized by sight: perhaps neither fish nor fowl…no notched gills in rhodxanthus, nor bluing in this specimen. Not really red enuf on the cap for either species, and a velvetty texture would be lost with time…
I’d like to hear why Irene thinks it also might be pelletieri…

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
The Big Bolete Book
By: Dave W (Dave W)
2010-10-23 07:41:57 CEST (+0200)

lists spore size for P. rhodoxanthus ssp. americanus as (8 – 14)x(3 – 5) mu, which is not a lot different than P. arenicola (9 – 12)x(4 – 5). Notched gills are unsual for this genus, and dark cap color matches arenicola. Except for arenicola being a rare species, why is this proposal ruled out?

For all I know,
By: Irene Andersson (irenea)
2010-10-22 19:34:12 CEST (+0200)

Phylloporus rhodoxanthus (ssp. americanus) is an american species,
Phylloporus rhodoxanthus ssp. europaeus (=Phylloporus pelletieri) is european, but both are said to occur in North America. The cap colour is variable in both, and I don’t really know how to tell the difference..

Whoa…this is getting bizarre
By: Ron Pastorino (Ronpast)
2010-10-22 19:19:56 CEST (+0200)

and the voting is starting to resemble an Afghani election!
I don’t doubt it is a Phyollyporus but I think P. pelletieri is a stretch. It is basically a footnote in the Bessette book and what information I can find…
the cap color and texture is wrong (redder, smoother and velvety).
P. rhodoxanthus still looks to be the best default guess.

What i
By: damon brunette (damonbrunette)
2010-10-22 14:40:29 CEST (+0200)

always like about Christian’s comments, is that he adds helpful insight about why he leans one way or another. He even realizes the fact that Im east coast, and may know we dont even have that Phylloporus out here
Irene Andersons photo on Kou http://www.mushroomexpert.com/... shows that big contrast in colors, thats why i thought this.
Gill attachment for rhodoxanthus the original label, does not look like the pictured specimen ‘in any way’, but strange things happen in nature.
Glad everyone was able to key it out

If I found this
By: Dave W (Dave W)
2010-10-22 13:59:14 CEST (+0200)

I would think “Thich.” But the Phylloporus seen via the link seems to fit pretty well.


This is a Phylloporus
By: Christian (Christian Schwarz)
2010-10-22 06:57:05 CEST (+0200)

The cap has very distinctive spotting – I see this on almost every Phylloporus I find out here. Also, the contrast between the cap color and gills is too strong for the local entity we call Tricholoma “flavovirens”.

Spores are not Tricholoma-like
By: Ron Pastorino (Ronpast)
2010-10-22 06:20:12 CEST (+0200)

in any way. They are more Boletenoid and they don’t match T. flavovirens which are listed as elliptic 6-7 X 4-5 microns.

looks like a trich
By: damon brunette (damonbrunette)
2010-10-22 05:23:42 CEST (+0200)
Gill attachment is a little unusual
By: Ron Pastorino (Ronpast)
2010-10-22 05:15:47 CEST (+0200)
but according to the usual references, they can be “adnate to decurrent but sometimes seceding”.
Gills of this specimen
By: Terry (fungaloony)
2010-10-22 03:33:17 CEST (+0200)

The only Phyloporus I’ve seen have decurrent gills. Your specimen appears to have notched gills..


Created: 2010-10-22 02:57:45 CEST (+0200)
Last modified: 2013-04-24 02:01:53 CEST (+0200)
Viewed: 303 times, last viewed: 2018-09-12 21:38:19 CEST (+0200)
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