Observation 69888: Phylloporus arenicola A.H. Sm. & Trappe

Found beneath Ponderosa Pine, in hot, moist, sandy, ashy soil. Spring Desert heat. Western slope 3300’. Staining green. Olive cap. “Screamed Bolete”.

Found, photographed, and notes by Rory Pease.

Species Lists



Proposed Names

31% (5)
Recognized by sight
-67% (5)
Recognized by sight
33% (6)
Recognized by sight: everything else looks good for macro; cap should be olive-toned, fading to dull pale brown, cap dry, velvety, subtomentous. I just found this in our spring, dry mountains.
Used references: Bessettes Big bolete book.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Great to see you on MO, Danny!
By: Tim Sage (NMNR)
2011-07-12 22:55:35 CDT (-0400)

Lets give a warm welcome to the PSMS’s Danny Miller!

Honestly though.
By: Rory Pease (Rory Pease)
2011-06-25 23:47:04 CDT (-0400)

From the available texts I have read on this specimen, I would assume that it is an un-recognized Phylloporus due to its ecology. The species within Phylloporus are not at all perfect and it looks like a bunch of the information is incomplete due to a lack of control, or actual specimens. I apologize for not bringing it back with me. It was within my power.

By: Rory Pease (Rory Pease)
2011-06-25 23:41:57 CDT (-0400)

I usually take a cap shot. I will go back through the file to check. I was walking down a mountain with a bag of morels. I should have carried it with them, but that did not happen. I did not want to contaminate any of the specimens in case they were looked at under the microscope. I threw the Phylloporus down the two sides of the mountain though. Haha. I would be willing to guess that the mushroom is not that rare in that specific eco-system during this time of the year. I will find it again…

What a confusing Genus…..
By: Tim Sage (NMNR)
2011-06-23 15:31:18 CDT (-0400)

All I hear is contradicting data! I wish I was the one to collect it so I could study the damn thing!

I’ve never seen a Phylloporus in person. I’m not sure what this is, but what makes it NOT P. rhodoxanthus?

decurrent bluing gills
By: Darvin DeShazer (darv)
2011-06-23 14:50:33 CDT (-0400)

The gills of P. arenicola can be decurrent and there are several photos here on MO that show it. http://mushroomobserver.org/image/image_search?pattern=Phylloporus+arenicola

This species will also, at least sometimes, BLUE when the gills are bruised.

By: Drew Parker (mycotrope)
2011-06-23 13:29:42 CDT (-0400)

Both Arora (MD), and Bessette list decurrent as a possible gill attachment for P. rhodoxanthus, AND Arora, Bessette, plus Smith do not use decurrent in their P. arenicola descriptions, and only Bessete allows for “subdecurrent” for the latter. Arora goes so far as to use adnexed gills of P. arenicola to differentiate it from P. rhodoxanthus’ more decurrent gills.

I know size is not set in stone….
By: Tim Sage (NMNR)
2011-06-23 13:00:00 CDT (-0400)

But this guy appears to be close to twice as large as the description for P. arenicola.

Also, many of the descriptions I have read list the gills of P. arenicola as adnexed, where these are clearly at least subdecurrent.

There is no microscopy to be done, the specimen was tossed. :(

If I would have collected it, I would have had the thing vouchered! I guess we’ll never know for sure with the info he provided….

that’s what the books say…
By: Debbie Viess (amanitarita)
2011-06-23 11:54:09 CDT (-0400)

but staining in many boletes appears to be a variable feature. size is not set in stone either.

other than staining, it is a very good match for arenicola. what about the microscopy?

this is not rhodoxanthus with decurrent gills.

By: Drew Parker (mycotrope)
2011-06-23 00:42:26 CDT (-0400)

Tim is correct. P. arenicola does not stain bluish or greenish.

These are the only photos he took.
By: Tim Sage (NMNR)
2011-06-23 00:13:31 CDT (-0400)

He says it was olive green.

I thought P. arenicola was smaller then this, and also non-staining?

got cap shot?
By: Debbie Viess (amanitarita)
2011-06-22 22:51:30 CDT (-0400)

that would help…

Created: 2011-06-22 21:26:10 CDT (-0400)
Last modified: 2012-10-20 04:16:11 CDT (-0400)
Viewed: 259 times, last viewed: 2018-05-04 09:46:32 CDT (-0400)
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