Observation 72700: Suillus glandulosus (Peck) Singer

When: 2011-07-26

Collection location: Bonaza Creek LTER, near Fairbanks, Alaska, USA [Click for map]

64.7666796° -148.2740661°

Who: Tom Bruns (pogon)

Specimen available

I am puzzled by this Suillus. We found it in a forest of White Spruce (with paper birch and alder), but there was no pine within hundreds of miles, and no larch. It has a prominent annulus, probably a gelatinous pileus (but its dry weather). The tubes are radially elongated. I’m pretty sure I’ve never seen this. I just bet Kabir Peay a beer, that if I posted this on MO someone would recognize this and give it a correct name by days end.



Proposed Names

27% (3)
Recognized by sight
5% (4)
Recognized by sight: how can we possibly say anything with such crappy photos, BUT, in order to have Kabir pay for the beer, we (Nhu & else) suggest Suillus imitatus
Used references: North American Boletes
46% (4)
Eye3 Eyes3
Recognized by sight: Pierre-Arthur Moreau recognized it from this: http://www.flickr.com/photos/19369983@N06/5212417848/ and the dark purplish spore print fits

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Go look at web link – this seems like a very good fit to glandulosus
By: Tom Bruns (pogon)
2011-12-06 20:02:13 EST (-0500)

As I mentioned when I posted the name glandulosus, Pierre-Arthur Moreau, a French mycologist that was at the MSA meeting and recognized it. He also pointed me toward this image: http://www.flickr.com/photos/19369983@N06/5212417848/ , which is a good match.
The dark (fuscoboletinus) spore print limits the options to a small handful of described species, all of which can be eliminated except S. glandulosus. Although I had not seen this species before, I’m convinced that’s what it is.

By: Christian (Christian Schwarz)
2011-07-28 08:47:03 EDT (-0400)

No larch, stipe not hollow, cap not shaggy, pores not yellow-green… what speaks in favor of that name proposal?

ok, maybe it could be Suillus imitatus
By: Tom Bruns (pogon)
2011-07-27 22:01:33 EDT (-0400)

I picked up another collection of this thing. Its pretty common here. Maybe it could be S. imitatus, at least in some usage of that name. It probably does fit somewhere near caerulescens, We’ll get a sequence, and we probably need to sequence the type too. Whatever it is, its interesting that its with spruce.

By: Christian (Christian Schwarz)
2011-07-26 23:10:05 EDT (-0400)

I have seen plenty of S. caerulescens from patches I walk by practically every week turn green, especially in young fruitbodies.

No ITS sequence yet – not that fast, but…
By: Tom Bruns (pogon)
2011-07-26 21:15:37 EDT (-0400)

I used the name imitatus for awhile for some of the caerulescens-like material that stains green (following Smith and Theirs key in the monograph), but as I remember that distinction didn’t stand up to ITS. Maybe there is something distinct that could be called imitatus, but I’m skeptical.

By: else
2011-07-26 19:02:33 EDT (-0400)

do you have an ITS sequence for comparison?
and what is against S. imitatus (described from spruce-fir forest in WA).

None of the above
By: Tom Bruns (pogon)
2011-07-26 18:48:53 EDT (-0400)

definitely not imitatus or grevillei, but the later is sort of similar.

Yeah with no larch around…
By: Christian (Christian Schwarz)
2011-07-26 16:53:37 EDT (-0400)

It looks to me like an elongated Suillus grevillei but…

Anyway, I approve of this newly imagined drinking game.

Created: 2011-07-26 16:26:23 EDT (-0400)
Last modified: 2011-12-06 21:59:44 EST (-0500)
Viewed: 231 times, last viewed: 2018-10-17 11:42:45 EDT (-0400)
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