Observation 47765: Phylloporus leucomycelinus Singer

When: 2010-06-28

Collection location: Jamieson Park, Poynette, Wisconsin, USA [Click for map]

Who: Steve Nelsen (sfnelsen)

No specimen available

Photo taken on 6/27/2010. I believe that this should be called P. rhodoxanthus ssp. albomycellenus Snell and Dick., because of the white mycelium traces at the base of the stem, instead of the yellow coloration in ssp. americanus. I am aware that Singer (with M.H. Ivory), a vigorous ‘splitter’, raised this subspecies to a species, P. leucomycelinus in 1978, but since it is so clearly like P. rhodoxanthus, I do not consider that to be a useful distinction, and will use the older name. The one illustrated had a 4 cm. cap and stem 4.5 cm. long below the gills. The spores were brownish yellow, ~7×3 microns. We saw the larger larger one (5.5 cm) on the same walk. It is quite common at Jamieson Park, and I always think it is a Boletus unless I feel under the cap.

[admin – Sat Aug 14 02:01:34 +0000 2010]: Changed location name from ‘Jamieson Park, Poynette, Columbia Co. WI, USA’ to ‘Jamieson Park, Poynette, Wisconsin, USA



Proposed Names

47% (3)
Used references: Snell, W. H.; Dick, E. A. The Boleti of Northeastern North America, Cramer: Lehre, 1970.
70% (3)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Like it or lump it …
By: Patrick Harvey (pg_harvey)
2010-06-30 14:16:48 PDT (-0700)

I vote with the “lumpers” here, pending approval of the new name.

Hey, you only need 2% more!

ah, the joys and heartbreaks of MO!
By: Debbie Viess (amanitarita)
2010-06-30 11:23:46 PDT (-0700)

Your protest at the new name has been duly noted here…but the naming of the actual mushrooms on this site is a consensus…and Noah’s opinion outweighs yours. This is not an arbitrary thing, but determined through MO usage and quality of information/IDs etc.

As shown on the recent key to Phylloporus species of the Neotropics and North America in the current issue of Mycologia, there are only two species of Phylloporus that have reddish caps and white mycelia: leucomycelinus and alborufus, a newly described neo-tropical species.


Unless you can find others who are willing to vote with you, the Phylloporus name of leucomycelinus will stand (and in fact looks valid).

I still think it should be called rhodoxanthus ssp. albomycelinus
By: Steve Nelsen (sfnelsen)
2010-06-30 10:20:36 PDT (-0700)

Although Singer later published a name that had a Latin diagnosis and you can use it if you want, I couldn’t care less, and do not think that it is useful to call this fungus by a different species name than rhodoxanthus. And why won’t M.O. let me change the name back to what I think it should be? I posted it in the first place, and aslo acknowledged the existence of Singer’s name. I simpley prefer not to use it.
Steve Nelsen

By: Noah Siegel (Noah)
2010-06-29 18:33:12 PDT (-0700)

P. leucomycelinus is considered a good species now… (by most)
however are you sure about the spore size? or is that a typo…

also a key to Phylloporus

nice example, Steve!
By: Debbie Viess (amanitarita)
2010-06-29 08:00:17 PDT (-0700)

I love the bright colors in this mushroom.

well, they are boletes, kinda…in fact, I hear tell that this is a good edible, although here in CA they are not commonly collected in quantity.

if you see lots where you are, try it, and let us know how it tastes!

Created: 2010-06-28 09:30:41 PDT (-0700)
Last modified: 2016-03-31 06:43:28 PDT (-0700)
Viewed: 105 times, last viewed: 2018-09-20 19:14:18 PDT (-0700)
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