Observation 145791: Leccinum oxydabile (Singer) Singer
When: 2013-09-09
No herbarium specimen

Notes: This was one of several Leccinum species we found while foraying near EHI. It’s a new species to me. Though the range of Betula papyrifera, its tree host, ostensibly extends south to NJ, I am yet to find this one in my home state.

Proposed Names

77% (2)
Eye3 Eyes3
Used references: B-R-B; used the keys in the book to arrive at this ID

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Well, guess so.
By: Gerhard Koller (Gerhard)
2013-09-20 19:31:51 WIB (+0700)

As far as I know L. pulchrum is European-only. Thanks for your input.

Reading the NA Bolete Book…
By: Dave W (Dave W)
2013-09-20 19:28:43 WIB (+0700)

and L. roseofractum is quite similar to L. oxydabile, except that the stained context of rosefractum goes from reddish to grayish.

I find nothing about L. pulchrum in the book. So maybe this name does not apply to North American material…?

At any rate, maybe Igor will have more to say about the staining pattern for this collection.

All this
By: Gerhard Koller (Gerhard)
2013-09-20 19:19:42 WIB (+0700)

applies to L. roseofractum and L. pulchrum too.
Is this taxon DNA-supported?

According to the NA Bolete Book (B/R/B),
By: Dave W (Dave W)
2013-09-20 19:08:01 WIB (+0700)

L. oxydabile looks just like L. scabrum, grows along with birch (like L. scabrum), but differs from scabrum in that the context stains distinctly reddish and the pores bruise ochraceous. So although I have not ever IDed this type, it seems like it should not be difficult to nail this one.

Bolete Book lists Singer as the author.

By: Gerhard Koller (Gerhard)
2013-09-20 18:42:31 WIB (+0700)

This photo strongly reminds me of L. roseofractum or L. pulchrum which I know very well from both Austria and Czech Republic. Whereas L. roseofractum slowly turns reddish L. pulchrum immediately is blushing. But as the finds were made in America and I do not think both mentioned species do occur over there I therefore am unable to put a name to this. I just would like to know what the status of oxydabile Singer ss. Singer 1938a is. And what has become of oxydabile ss. Snell?

Blushing form of scabrum? That could apply to roseofractum and pulchrum as well.
I am not very fond of what the Dutch did to Leccinum and try to avoid them. I am still sticking to Lannoy et Estades instead although I think they have too many species in their concept whereas Noordeloos et DenBakker have too few :D

By: Irene Andersson (irenea)
2013-09-20 18:34:44 WIB (+0700)

this is certainly not what I call variicolor..
According to Noordeloos & Den Bakker, the name oxydabile has been used for a blushing form of scabrum.

What is L. oxydabile?
By: Gerhard Koller (Gerhard)
2013-09-20 17:01:22 WIB (+0700)

Is this the taxon ss. Singer 1938a (as Krombholzia oxydabilis) ?
I was taught that this taxon is a nomen confusum and should be called L. variicolor (or one of its varieties).
Did they re-erect the name?

Created: 2013-09-18 09:25:52 WIB (+0700)
Last modified: 2013-09-20 19:24:15 WIB (+0700)
Viewed: 159 times, last viewed: 2017-06-17 01:37:44 WIB (+0700)
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