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When: 2013-08-24

Collection location: Buncombe Co., North Carolina, USA [Click for map]


Who: Mike Hopping (AvlMike)

No specimen available

Found hiding among the dead black trumpets in a mixed pine, oak and mountain laurel woods. Cap viscid. Cut context initially white, coloring through fleshy pink to dull, ashen brown. The base of the stipe stains blue. Taste mild.


Boletus viscidocorrugis.jpg
Boletus viscidocorrugis 2.jpg
Boletus viscidocorrugis chem.jpg

Proposed Names

91% (2)
Used references: North American Boletes
Based on chemical features: NH4OH on cap bright red fading to dull red. KOH on cap cherry red. KOH on context yellow-orange
91% (2)
Recognized by sight: They are the same, originally thought to be different because of the blue staining flesh.

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

= Observer’s choice
= Current consensus


Add Comment
I concede
By: Mike Hopping (AvlMike)
2013-11-10 19:05:05 MST (-0700)

My Ouiji board was slow in responding but reports that a number of second-hand sources in the know consider B. viscidocorrugis the same as B. longicurvipes. So how about deprecating B. viscidocorrugis?

My experience w/B.longicurvipes is….
By: Bill (boletebill)
2013-08-26 10:39:50 MST (-0700)

…that like many boletes it changes dramatically over a very short period of time. B. longicurvipes is somewhat common in CT and it can be observed to go through a variety of color changes, staining reactions and rapid decay in 4 or 5 days. The color of the cap changes, the color of the scabers change, the lack of or presence of blue stains change over time from the same collections. This has been my experience with this mushroom and I have seen collections of these mushrooms that stained blue at the base and pinkish through the stipe that looked exactly like others that didn’t display these staining reactions.

Deprecated species?
By: Mike Hopping (AvlMike)
2013-08-25 08:05:45 MST (-0700)

If a species name is considered invalid, wouldn’t it make more sense to deprecate the name than to change the ID of individual observations for reasons other than bad fit with the description of a still accepted species?

Perhaps Newbie Won Dont-knowbe misunderstands, but it would suck for the politically popular termite strategy of hollowing out a status quo to find a home in mycological taxonomy. If a species stands as valid but observations can’t fit it, or do so for inscrutable reasons, that sows confusion in the masses trying to test prospective IDs against available information.

Meanwhile, a person with a functional Ouiji board has offered to address a question to the ether. I’ll report if an answer is received.

Sitting here in limbo
By: Mike Hopping (AvlMike)
2013-08-25 04:55:54 MST (-0700)

Thanks, guys.

I guess we await publication then. My Ouiji board is on the fritz.

Personal commutations
By: Noah Siegel (Noah)
2013-08-25 03:12:41 MST (-0700)

with Manfred Binder, who sequenced the type of B. viscidocorrugis said “I wanted to mention Ernst Both agrees that Boletus viscidocorrugis = B. longicurvipes after obtaining ITS sequences”

The late Ernst Both…
By: I. G. Safonov (IGSafonov)
2013-08-24 21:34:09 MST (-0700)

…who originally described B. viscidocorrugis thought it was sufficiently different to be more than just a subspecies of L. longicurvipes. Perhaps it should remain such until it could definitively be proven otherwise. The only evidence to settle the argument (and conclude “the battle of titans”) would naturally come from DNA sequencing. Since this is not a priority topic in “boletology”, I am afraid we would have to wait a little while to get the answer. Let’s hope we are all around when that happens. :)

Based on what evidence?
By: Mike Hopping (AvlMike)
2013-08-24 20:54:44 MST (-0700)

How ‘d do, Noah. I wouldn’t want to wade into a battle between titans, but what evidence suggests that B. viscidocorrugis is the same as B. longicurvipes? This specimen, and two others recently collected in my area, look different than the common B. longicurvipes we find. I admit that I haven’t set around and watched the slow progression of context color changes in B. longicurvipes to learn whether it’s different from the white, through pink, to ashy brown of the specimen shown, but the blue staining, corrugated cap and brown scabers over a very textured stalk seem distinctly different to me.

I’m happy to be educated . . .