Observation 28750: Polyporus radicatus Schwein.

When: 2009-11-25

Collection location: Georgia, USA [Click for map]

Who: AmatoxinApocalypse (AmatoxinApocalypse)

Specimen available

Found growing at the base of a old tree, an oak tree I think.



Proposed Names

-38% (3)
Recognized by sight
-46% (2)
Recognized by sight
41% (3)
Recognized by sight: radicatus?
73% (3)
Eye3 Eyes3
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thank you.
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-12-20 15:13:42 CST (-0500)

Thanks to everyone who helped identify this specimen!

Thanks Erin
By: Irene Andersson (irenea)
2009-11-27 03:45:54 CST (-0500)

Now I’m convinced too :-)

By: Erin Page Blanchard (CureCat)
2009-11-26 15:18:10 CST (-0500)

Okay, I am going to propose the name.

But for the record, it was Irene’s idea. ;)

The base of the stipe.
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-11-26 13:28:50 CST (-0500)

This one had a very deep rooting base, it was like pulling a turnip up when I collected it :)

P. radicatus
By: Erin Page Blanchard (CureCat)
2009-11-26 06:09:55 CST (-0500)

Well I can see what makes you think it has a rooting stipe… In fact, if you enlarge the image fully, you can pretty certainly see that the dirt/rocky stuff is indeed attached to the base of the bare stipe. I am pretty convinced at this point, that it has a pseudorhiza.

P. melanopus seems to usually be more concave or depressed, where as this one is more plane or slightly convex, which seems consistent with the images I have seen of P. radicatus.

It has got to be that species, you should propose it.

By: Irene Andersson (irenea)
2009-11-26 04:24:05 CST (-0500)

was my first impression, but the species..?
It resembles one that I have found a few times, Polyporus melanopus. This seems to share a similar fleshy young stage (when it reminds of a small Boletopsis), but is larger and more browncapped from the beginning.
This key lead to Polyporus radicatus,
but I wanted to get it confirmed that it really is a “root” at the stem base, not something I just imagined..

By: Erin Page Blanchard (CureCat)
2009-11-26 03:25:58 CST (-0500)

Polyporus radicatus, eh? Good idea!

You should propose that species, I think you are probably right.

The last picture
By: Irene Andersson (irenea)
2009-11-26 01:54:50 CST (-0500)

Is it a rooting stem I see there?

Created: 2009-11-25 16:05:08 CST (-0500)
Last modified: 2009-11-25 16:05:08 CST (-0500)
Viewed: 111 times, last viewed: 2017-06-06 06:47:56 CDT (-0400)
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