Observation 22434: Tuberales sensu lato

When: 2009-06-18

Collection location: near Echo Summit/Highway 50, California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

These were about 85% buried and up about 9.0 cm broad, potato-like and somewhat spongy. No strong odor. The buried portions were incrusted with dirt and needles and impossible to clean. I believe these are immature specimens as the gleba was light colored and I couldn’t find any spores.
I’m guessing Gautieria monticola at this point even though I don’t see an obvious columella. Trappe (North American Truffles) says it can be “inconspicuous” and “translucent”.

[admin – Sat Aug 14 02:03:33 +0000 2010]: Changed location name from ‘Near Echo Summit/Hwy 50, Ca.’ to ‘near Echo Summit/Highway 50, California, USA’

Species Lists


Proposed Names

1% (2)
Recognized by sight
4% (2)
Used references: See e-mail correspondence from Jim Trappe in comments.
28% (1)
Recognized by sight

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Add Comment
Response from Dr. Jim Trappe..
By: Ron Pastorino (Ronpast)
2009-09-02 16:36:30 PDT (-0700)

Hi, Ron,

I just got back from 5 months in Australia and had to look at your specimens right away, I couldn’t wait! Dan is right, they definitely are not a Gautieria. Even very young Gautieria specimens show a definite structure of chambers, basidia, etc. Destuntzia, too, would show distinct chambers filled with interwoven hyphae at an early age. Your specimens are just a structureless mass of thin-walled hyphae. I would not even guess what they are, except a fungus planning to do something, but I don’t know what. One might get an idea by doing molecular analyses. Otherwise, until you catch them in the act of fruiting, it’s anybody’s guess. I doubt they are a hypogeous species.

Still, thanks for sending them, really interesting even if unidentifiable. You mention they were spongy, and their very light weight as dried would also evidence that.


Not Gautieria monticola
By: Daniel B. Wheeler (Tuberale)
2009-06-25 17:24:18 PDT (-0700)

which should have a chambered loculate interior with at least some columella present, although the columella blends into the locule walls the further from the basal attachment it gets.

I’m not sure what you’ve got here. I’d send it to Dr. Trappe and have him look at it. It might be something like an immature Destuntzia.