Observation 9625: Gastroboletus ruber (Zeller) Cázares & Trappe

When: 2008-08-15

Collection location: Surprise Lake, Snohomish Co., Washington, USA [Click for map]

Who: Sam Linse (BearwoodSam)

No specimen available

Among the dozen or so species we found on the hike to Surprise Lake this has got to be the most bizarre.
Found on the trail in mature sitka spruce, douglas fir, western hemlock, western red cedar forest at about 1000M elevation. Two clumps of this fungus rose from the dirt about a foot away from each other. Smelled a bit chemical, and when broken apart it turned slightly blue for a bit. It later reverted to a soft yellow flesh.
Hope someone can help identify this.

Species Lists



Proposed Names

-77% (2)
Recognized by sight: a secotioid bolete. misshapen, semi-subterranean red-brown and yellow “cap”, yellow context, quickly bruises blue.
beautiful specimen!
Used references: Arora’s MDM.
-7% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
great fun!
By: Joshua Birkebak (Shua)
2008-08-21 08:57:37 CEST (+0200)

That was a great find and thread! This is why I love this site! Such fun working through this species!

Thanks, Darv. Gastroboletus ruber it is!
By: Debbie Viess (amanitarita)
2008-08-21 05:51:44 CEST (+0200)

The “USDA Handbook to Strategy 1 Fungal Species” that you linked to had an excellant description explaining the “pseudo”-reticulum; it is apparently caused by remnants of a normally evanescent peridium, which covers the apical pore mouths, but in this case persists, and then depresses in a way that resembles reticulum. The Bessetts book and other online sources didn’t mention it.

Everything else fits too, altho that’s the same lousy photo, in even poorer quality, that I tracked down online yesterday.

Sam’s photo is waaaaay better; maybe they’ll use his in the next addition!

BTW Sam, check/correct the above spelling of Gastroboletus. Other than that, I think our work is done here.

By: Darvin DeShazer (darv)
2008-08-21 04:08:08 CEST (+0200)

Description on page 75. Also another photo

wish your hunting grounds were a wee bit closer…
By: Debbie Viess (amanitarita)
2008-08-21 01:34:54 CEST (+0200)

…I’d be there in a flash.

anyone for a hike?
By: Sam Linse (BearwoodSam)
2008-08-20 23:35:44 CEST (+0200)

it might still be there, I saw it on Friday the 15th. I could tell you approximately where it was on the trail.

…back to the drawing board…
By: Debbie Viess (amanitarita)
2008-08-20 18:47:00 CEST (+0200)

the other photos of G.ruber that I saw online looked vaguely like your mushroom, but weren’t sharp; of all of the descriptions that I could find this morning, NONE mentioned the unusual and highly distinctive cap reticulation. I think that you have an undescribed species here…too bad you didn’t save it.

Don’t belittle yourself…the more one knows, the more one knows how little one knows!
By: Debbie Viess (amanitarita)
2008-08-19 20:56:39 CEST (+0200)

…and this is the beauty of Nathan’s cooperative site…we all build upon each others knowledge.

Just a novice here
By: Sam Linse (BearwoodSam)
2008-08-19 20:28:56 CEST (+0200)

You did 95% of the work Debbie. It was your suggested name that led me to the rubus. Otherwise I’d have never known where to start. Thank you both!

Round fungi into a square hole…
By: Debbie Viess (amanitarita)
2008-08-19 19:44:06 CEST (+0200)

Yup, turbinatus was a catch-all; I don’t have the secotiod boletes books to go much deeper…shoulda done an internet search! Nice job, Sam; looks like ruber is a match…and YOUR photos are way nicer! ;)

By: Joshua Birkebak (Shua)
2008-08-19 03:16:02 CEST (+0200)

Truly an interesting find! I would not call it gastroboletus turbinatus though… That species as a rather normal, velvety pileus and a rather different stature… The somewhat reticulate surface is really interesting!

Created: 2008-08-18 23:40:21 CEST (+0200)
Last modified: 2008-08-18 23:40:21 CEST (+0200)
Viewed: 250 times, last viewed: 2018-11-18 23:48:35 CET (+0100)