Observation 166396: Cantharocybe gruberi (A.H. Sm.) H.E. Bigelow & A.H. Sm.


Collector(s): Travis Fulton
Determined: 5/10/2014
Determiner: Sava Krstic
Original Determination: Hygrophorus
Habitat: Conifers dominated by Pinus ponderosa (Ponderosa Pine)
Growth Habit:
Substrate: Wood, dead
Closest plant:
Other Habitat & Locality Notes: just N. of CG, growing on stump (probably Pinus ponderosa)
Spore print:
Other Specimen Notes: Gills with pink tint (under room light).

Species Lists


Copyright © 2014 Sava Krstic
Photo by Sava Krstic
Copyright © 2014 Sava Krstic
Photo by Sava Krstic

Proposed Names

28% (1)
Recognized by sight
28% (1)
Recognized by sight: more information needed

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
on stump
By: Joe Cohen (Joseph D. Cohen)
2014-06-05 14:17:58 CDT (-0500)

The collector wrote (on the back of label): “Growing on stump” (and I changed the Observation Notes to reflect this). I see that there is an earlier documented specimen growing on a conifer stump.
Ovrebo CL, Lodge DJ, Aime MC (2011) A new Cantharocybe from Belize with notes on the type of Cantharocybe gruberi. Mycologia September/October 2011 vol. 103 no. 5 1102-1109, 1107 (Supplemental material studied includes “Okanogan County: Okanogan National Forest, Mount Annie, F.S. Road 300, 25 Jun 1997, solitary on conifer stump, MTS 4391 (… at WTU)”).

hi Sava.
By: Debbie Viess (amanitarita)
2014-06-05 10:47:21 CDT (-0500)

of course I get it. we have all put names on things where they don’t fit comfortably.

but of course, an ill-fitting name is a GREAT way to get attention here on MO! Better than just saying “Fungi,” or “Agaricales” as a matter of fact. It’s a red flag for taxo-attention!

So, that ill-fit of Hygrophorus serves its purpose.

It might be useful in future to put a question mark on those sorts of IDs, right on the label itself. That way others know that the ID needs more work.

Indeed, I had the same shocked and amazed reaction when I first put this species under the scope … a WTF is THAT??!

Glad you saved this one, and we could all work together to get a better ID. Fungal detective work is FUN!

BTW, that yellow color, pinkish gills and a sometimes cracking cap also seem to be good characters for Cantharocybe, even w/out the scope work. But those cystidia NAIL it!

By: Sava Krstic (sava)
2014-06-05 00:35:36 CDT (-0500)

“Hygrophorus” was just the best name we had at the moment. We knew (especially, Steve Trudell knew) that this was something unusual. It just had to wait for someone to work on it … and for Noah to help along the way. He spoiled some of the fun though: I can imagine how surprised I would have been with these cystidia in front of me and without any knowledge about Cantharocybe.

Just as you say, cheilo info suffices here; and true, I couldn’t see any spores.

that’s a better fit!
By: Debbie Viess (amanitarita)
2014-06-04 10:39:19 CDT (-0500)

glad that this ID could be corrected, and more details added. Sure didn’t look like a Hygrophorus to me! ;)

Your micrograph is a perfect fit to those bizarre, balled cheilocystidia that I also observed/posted on my obsie of this sp here: http://mushroomobserver.org/image/show_image/43965?obs=21104&q=2025M

these are definitive even in the absence of spores, like for my obsie of another immature fb.

and once again, a great reason to SAVE THOSE SPECIMENS, esp. when they just don’t fit neatly …

thanks for your follow-up, Sava.

By: Sava Krstic (sava)
2014-06-04 02:50:10 CDT (-0500)

Thank you for the id. I’m happy to confirm that this mushroom is indeed Cantharocybe gruberi. It has the cheilocystidia as depicted in Ovrebo, Lodge, and Aime (http://www.mycologia.org/content/103/5/1102.full).

There is a specimen
By: Joe Cohen (Joseph D. Cohen)
2014-06-02 16:33:06 CDT (-0500)

There is a specimen, and I’ve added that to the Observation. Thanks for catching my omission.
I’ll forward your other questions to Sava Krstic.
— Joe

By: Debbie Viess (amanitarita)
2014-06-02 13:40:49 CDT (-0500)

gills? what made it a Hygrophorus to the IDers? What squat, yellow Hygrophorus sp are there in the West, other than chrysodon?

no herbarium specimen??! say it ain’t so!

Created: 2014-06-02 10:02:50 CDT (-0500)
Last modified: 2014-06-05 13:21:44 CDT (-0500)
Viewed: 275 times, last viewed: 2018-02-18 08:37:04 CST (-0600)
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