Observation 139208: Buglossoporus quercinus (Schrad.) Kotl. & Pouzar

Orange-tan top with pale, rounded margin; soft, smooth, white hymenium (that reminds me of Fistulina hepatica), up to 9" wide (est.) seen fruiting on one log only. First time seeing this species.

Species Lists


August 24 fruit body extremely palmate, lobed, about 1/2" to 1" thick, still with very dark reddish stains, underside black, tufted, to old to collect.

Proposed Names

28% (1)
Recognized by sight
-53% (3)
Recognized by sight: Looks like a young I. resinosum, except the color atop is more yellow that I’m used to seeing.
25% (4)
Recognized by sight: If thas was in Europe and oak, I would defintely suggest Piptoporus quercinus. For me it doesnt really look like an Inonotus at all, but I dont know the genus in NA. Cheers
18% (2)
Recognized by sight: If the North American collections are in fact conspecific
92% (2)
Eye3 Eyes3
Used references: Index Fungorum current name

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Oh no
By: Jacob Kalichman (Pulk)
2016-08-14 17:10:52 CDT (-0500)

I thought I was the only Jacob on MushroomObserver.

Hello Jacob
By: Phil Yeager (gunchky)
2016-08-14 16:33:01 CDT (-0500)

Piptoporus quercinus is a deprecated synonym of Buglossoporus quercinus.

Erlon – I have several collections of this species from VA
By: Martin Livezey (MLivezey)
2016-02-08 08:15:37 CST (-0600)

If you or anyone else would like to do some genetic analysis to determine if this is conspecific with european and /or asian collections, please let me know. I think it could be a great study.

Ok per species page
By: Martin Livezey (MLivezey)
2016-02-07 19:28:07 CST (-0600)

B. pulvinus is deprecated according to Index Fungorum
Is there something more recent?


A dry specimen
By: Irene Andersson (irenea)
2013-07-18 01:21:50 CDT (-0500)

of a Piptoporus should be extremely light in weight.. They cause brown rot in hardwoods (Polyporus and Inonotus cause white rot).

These look very young, so they may not have any spores to look at.
There are at least two possible species of Piptoporus, quercinus and soloniensis.
P. quercinus has a pure white context, in soloniensis it’s orangish and brittle when dry.

Wow Irene!
By: Martin Livezey (MLivezey)
2013-07-17 17:33:31 CDT (-0500)

The photos look very similar to me. I have a dried specimen – can you tell me how I could positively identify it? I don’t believe we have much experience with this species in this country.

Piptoporus quercinus
By: Irene Andersson (irenea)
2013-07-17 12:44:50 CDT (-0500)

is listed from USA (Pennsylvania) by Josef Vlasák:

Here is one of his photos: http://mykoweb.prf.jcu.cz/...

Glad to see you here, Jacob!
By: Irene Andersson (irenea)
2013-07-17 03:59:33 CDT (-0500)
- and Piptoporus quercinus sounds like a very good idea too :-)
Thanks for your comment, Jacob
By: Martin Livezey (MLivezey)
2013-07-16 16:51:14 CDT (-0500)

It probably was on oak, but not certain. Definitely not Piptoporus betulinus, the only P. I know. I wonder if P. quercinus grows in NA…,

Please welcome Jacob on his first post on MO. Here is a link to his book on Lactarius: http://www.svampe.dk/...

Great call Richard!
By: Martin Livezey (MLivezey)
2013-07-09 20:22:45 CDT (-0500)

This one had me stumped and moves me along toward more recognition of Inonotus in general. I am familiar with I. dryinus which is different and more variable. Thanks Dave W for your suggestion. Ganoderma was never very convincing.

I think you’ve got it, Rich.
By: Dave W (Dave W)
2013-07-09 12:13:17 CDT (-0500)

Here’s a link showing similar fruit bodies.

Ischnoderma resinosum is mainly an Autumn mushroom.

looks like…
By: Richard Kneal (bloodworm)
2013-07-09 12:03:47 CDT (-0500)

a young Inonotus hispidus (Bull. ex Fr.) Karst. Pelzporling Polypore hérisée, Shaggy Bracket Bracket 6–25cm across, 4–12cm wide, 2–10cm thick, fan-shaped, usually single but occasionally fusing with others into overlapping groups, surface felty-hairy varying from ochraceous to tobacco-brown, finally blackish and bristly. Tubes 10–20(50)mm long. Pores 2–3 per mm, circular to angular, pale ochraceous at first, later brown and glancing in the light. Spores rust, subglobose, 9–12´4–10m. Habitat usually on ash but commonly on other trees such as elm, apple and walnut. Season summer but persisting on the tree in blackened state throughout the year, annual. Frequent. Not edible. Distribution, America and Europe.

Created: 2013-07-09 05:22:11 CDT (-0500)
Last modified: 2016-08-13 17:25:51 CDT (-0500)
Viewed: 748 times, last viewed: 2018-05-24 01:01:22 CDT (-0500)
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