Observation 44611: Phylloporus rhodoxanthus (Schwein.) Bres.
When: 2009-06-17
No herbarium specimen

Notes: I believe that is ramariopsis kunzei in the foreground of the 2nd pic, I am trying to ID the orange mushroom.

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Have a look
By: Roy Halling (royh)
2010-05-05 06:32:33 PDT (-0700)

on p. 331 of Bessette et al., North American Boletes. See the pic of P. boletinoides? Can you see the pores? Also, have a look at http://www.nybg.org/bsci/res/hall/fiblatus.html. See my next postings -

Pardon me, but …
By: Paul Derbyshire (Twizzler)
2010-05-04 19:59:11 PDT (-0700)

… a boletologist? This mushroom clearly has gills, “-porus” ending on its genus name notwithstanding.

more macro features
By: Roy Halling (royh)
2010-05-04 08:12:29 PDT (-0700)

according to the descriptions in M.A. Neves’ dissertation, the lamellae of leucomycelinus are cyanescent – those of rhodoxanthus are not. Probably less discriminating is that the pilei are colored differently: more reddish in leucomycelinus and a tawny olive to cinnamon brown in rhodoxanthus.

a fair amount of collecting
By: Roy Halling (royh)
2010-05-04 07:58:49 PDT (-0700)

I know you do Walt. http://www.nybg.org/bsci/res/hall/boletes/PhylloporusKey.pdf go to this link and get a free copy of a key.

Pithy comment
By: walt sturgeon (Mycowalt)
2010-05-03 17:08:08 PDT (-0700)

Roy, I do a fair amount of collecting, mostly for the herbarium at Davis Elkins College. In this case I did not collect this Phylloporus. Again I ask are there other macroscopic ways to separate these two? I will look for the Mycologia article. How’s that broken leg doing?

Where are the specimens?
By: Roy Halling (royh)
2010-05-02 17:16:10 PDT (-0700)

Excellent that you discussed with Ernst – one of the most knowledgeable boletologists I know!

While my Phd student worked on Phylloporus with a slightly less than global perspective, it might be a good idea to contact her about her research. Oh, BTW, a paper will appear in Mycologia soon that documents the New World taxa as she knew them. She finished 2 years ago.

Might I make a slightly pithy comment here Walt? If you (the royal you) have data and sit on it, nobody knows. Then, when someone says something, that “sitting on” party exclaims: "Hey, mine’s red and yellow and green and blue Sanford’s brown. Valid observation. DO YOU HAVE A SPECIMEN!!!??

Yes, on the same fruit body.
By: walt sturgeon (Mycowalt)
2010-05-02 13:15:01 PDT (-0700)

I discussed this with Ernst Both and he said there are other differences. I don’t recall if there were macroscopic differences. I think P.rhodoxanthus and P. lecomycelinus both are blue when ammonia is applied to the cap cuticle. Are there other macro differences?

I like the second picture.
By: Johannes Harnisch (Johann Harnisch)
2010-05-02 13:10:39 PDT (-0700)
mycelium color
By: Roy Halling (royh)
2010-05-02 10:00:59 PDT (-0700)

white AND yellow on the same fruitbody?

Mycelium color
By: walt sturgeon (Mycowalt)
2010-05-02 09:32:26 PDT (-0700)

I have found fruitings in Ohio with white and yellow mycelium.

Rhodoxanthus
By: Roy Halling (royh)
2010-05-01 18:46:05 PDT (-0700)

only if it had yellow mycelium at base of stipe. If white mycelium, then it’s P. leucomycelinus.Go to my bolete website for a free PDF key on non-african Phylloporus. To ID Phylloporus properly, you need to note the basal mycelium color (yellow or white), oxidation reactions (bluing and where), flesh color (yellow or white), and ammonia reax – without that info, it’s Phylloporus sp.

Created: 2010-04-23 07:13:54 PDT (-0700)
Last modified: 2010-05-01 18:41:01 PDT (-0700)
Viewed: 187 times, last viewed: 2016-07-28 11:33:01 PDT (-0700)
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