Observation 51673: Gastroboletus Lohwag

When: 2010-08-29

Collection location: Tuolumne Meadows east of Mono Lake Trail, Yosemite National Park, Tuolumne Co., California, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

Part of Yosemtite Fungal Survey, collected by David Rust under lodgepole pine.

Proposed Names

-57% (1)
Used references: Thier’s “California Mushrooms, A Field Guide to Boletes”
31% (2)
Eye3 Eyes3
Recognized by sight: slow to blue, and then only partially blues; pores also partially blue. context yellow, with some red.
Based on microscopic features: good match for amyloideus…except the spores aren’t amyloid! ;)
23% (3)
Recognized by sight: Fruiting at the same time as other collections of G. vividus from the park.
Inamyloid spores.
-4% (2)
Recognized by sight: Have that micrograph?

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
good luck, Noah!
By: Debbie Viess (amanitarita)
2017-04-05 08:16:54 PDT (-0700)

it ain’t easy.

talking about serendipity and the laws of karma, after C’s caeruleus specimen went mysteriously “missing” from the SC Museum (after I had requested it), I stumbled upon your caeruleus collection at UCB!

I just love a delish dose of irony, don’t you?

So, there is gold in dem dar hills, and maybe a few cardboard boxes, too! :)

Allow yourself plenty of time to dig around, and say hi to the gang for me when you visit. ;)

By: Noah Siegel (Noah)
2017-04-04 18:22:21 PDT (-0700)

look into this when I visit UCB, and let you know what I find.

thanks for the description, Darv.
By: Debbie Viess (amanitarita)
2017-04-04 10:00:35 PDT (-0700)

I don’t believe this to be dinoffii, for the following reasons:

the locules are NOT tubules and radially arranged, a quite dramatic feature in the gleba illustrations of dinoffii in the original pub.

the columella edges are NOT dark red where it meets up with the gleba.

the context of the yellow columella does NOT rapidly turn blue, except in very restricted areas adjacent to the gleba.

rhizomorphs ARE present.

the farthest north that this very rare sp. has been confirmed is Fresno Co.

got description of dinoffii?
By: Debbie Viess (amanitarita)
2017-04-04 08:59:59 PDT (-0700)
By: Debbie Viess (amanitarita)
2017-04-04 08:51:35 PDT (-0700)

they are out of my hands and at UCB, with the rest of the YFS collections.

In reading thru the older dialogue here, I see that I must have looked at spores at the time, and even photographed them. Unfortunately, I lost photos when I transferred over to my new computer, and I can’t seem to locate any photos from that time period.

So, if someone wants to go deeper on this obsie, you’ll need to go to the Bruns lab and search thru lots of random boxes! :)

By: Darvin DeShazer (darv)
2010-09-05 10:32:47 PDT (-0700)

Try the key in Mycotaxon 83: 412-413
It is free, online at CyberLiber, An Electronic Library for Mycology

according to the G. vividus description in the Handbook to Strategy I Fungal sp…
By: Debbie Viess (amanitarita)
2010-09-05 08:15:24 PDT (-0700)

that species does NOT blue (nor did the other good example of it here, altho there was a suspicious patch of color on one fruit body, present when first dug up; depite that example being cut and lying about for a couple of days, no other blue color was noted):


This particular Gastroboletus species, collected by David did blue, slowly, on both pores and context.

The spores of the two are similar, tho. Perhaps it is the description that is wrong, and blueing variable?

will post micrographs soon.
By: Debbie Viess (amanitarita)
2010-09-04 13:07:09 PDT (-0700)

Created: 2010-08-30 07:48:15 PDT (-0700)
Last modified: 2017-04-04 18:20:50 PDT (-0700)
Viewed: 203 times, last viewed: 2017-07-19 23:12:18 PDT (-0700)
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