Observation 10247: Polyporus badius (Pers.) Schwein.

When: 2008-08-31

Collection location: Hershey, Pennsylvania, USA [Click for map]

Who: James V. Gallagher IV (lbjvg)

No specimen available

nongilled, white fleshy cap and stem, found on a rotting log – probably a hardwood.

did a spore print on black and white paper – but the results are doubtful because of possible ink running/contanimtion – anyway it looked light pink to me.

Possible focal blue bruising is noted after overnight on the spore print paper – again suspect due to possible ink contamination.

(I’ll just use white paper from now on.)

I am not able to classify this with the references I have. I think it is a stalked polypore.



Proposed Names

-12% (2)
Recognized by sight
41% (3)
Eye3 Eyes3
Recognized by sight: Young in age. As it matures and the margin stops growing, the cap should become all brown and the stalk turn black. One small fruiting body in photo 19091 shows a black base on the stalk.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Melanopus group
By: Irene Andersson (irenea)
2008-10-05 05:18:48 CDT (-0400)

I’m not an expert on this black-stiped group of polypores, but I have realized that they are widely misunderstood. In my opinion, this observation fits well with the descriptions of Polyporus badius, with the paler and thinner margin. It is the only one in this group that lacks clamps, an important character that should be checked (but not easy to determine).

Nathan’s example shows what I’d guess is Polyporus melanopus, with a uniformly coloured cap and a fairly thick margin. The cap becomes wrinkled, and dried stems shrink considerably. Without that character, there are other possibilities, for example Polyporus tubaeformis, also uniformly reddish brown cap, but with a thinner cap margin, sometimes zonate (but I think that is a northern species).

It is a stalked polypore.
By: Darvin DeShazer (darv)
2008-09-03 00:38:05 CDT (-0400)

Although there is NO substitute for a fungus in hand, sometimes pictures can match very well and still be (in)correct!?! Bernicchia has a beautiful color picture of P. badius that looks identical to photos 19384 & 19386. Bessette and Bessette has a photo with a large thick stipe that sure looks like these photos on MO. It would be nice to have herbaria material saved to go with the photos, but it would still take someone interested in this group to examine them and sort out the names. After going through Gilbertson a second time, I still arrive at the name Polyporus badius as the ‘best fit’.

Bernicchia, Annarosa. 2005. Polyporaceae s.l. Fungi Europaei Vol. 10. Edizioni Candusso, Alassio, Italy. 806p.
Bessette, Arleen R. and Alan E. Bessette. 2001. The Rainbow Beneath My Feet: A Mushroom Dyer’s Field Guide. Syracuse University Press, Syracuse, New York. 176p.
Gilbertson, R. L. and L. Ryvarden. 1986. North American Polypores Vol. 1. Fungiflora, Oslo, Norway. 433p.
Gilbertson, R. L. and L. Ryvarden. 1987. North American Polypores Vol. II. Fungiflora, Oslo, Norway. 885p.

Looks different than eastern ones
By: Tom Volk (TomVolk)
2008-09-02 12:14:43 CDT (-0400)

Hi Nathan. the pic on your link looks different than what we call P. badius in the east. Ours is way thinner. I have some pix of eastern P badius at here. Someone needs to work on this.

not P. badius sensu this westerner
By: Nathan Wilson (nathan)
2008-09-02 00:54:44 CDT (-0400)

By the time they are that big, they pretty much have to have a black stipe for me to call it P. badius. Here’s an example of what I would call P. badius. It would be interesting to see what the easterners apply this name to.

probably not P. badius sensu eastern authors
By: Tom Volk (TomVolk)
2008-09-01 12:57:20 CDT (-0400)

As I have traveled in the West, I see people calling a fungus Polyporus badius, which is clearly not the same fungus we call P badius in the east. I think someone probably needs to work on this. This specimen doesn’t look like our typical eastern P. badius— the stalk appears much too large and the flesh much too thick. Maybe it’s just young though.

FYI spore prints on polypores almost never work. Unlike gilled mushrooms, the sporulation period for polypores may last for the whole growing season, so during any one time, you usually don’t get enough spores to visualize on paper.

Created: 2008-08-31 11:06:54 CDT (-0400)
Last modified: 2008-08-31 11:06:54 CDT (-0400)
Viewed: 80 times, last viewed: 2018-07-16 03:48:38 CDT (-0400)