Observation 160731: Geopora arenicola (Lév.) Kers

When: 2014-03-04

Collection location: Oak Grove, Ripon, California, USA [Click for map]

Who: Randy Longnecker (Randy L.)

Specimen available

Growing from soil under cottonwood & oak leaves, majority of fruiting body below soil. Some fruiting single, some clustered.

Species Lists



Proposed Names

-56% (1)
Recognized by sight
60% (2)
Recognized by sight
61% (2)
Used references: Arora, Mushrooms Demystified. Outer hairs adhering to soil and sand clearly visible here.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Yes, riparian area.
By: Randy Longnecker (Randy L.)
2014-03-05 16:07:47 PST (-0800)

I’m still getting the hang of my microscope but I’ll see what I can do.

riparian area?
By: Debbie Viess (amanitarita)
2014-03-05 12:24:42 PST (-0800)


micro-characters would help for a specific ID.

similar in macro possibilities: G. arenosa, G. arenicola, G. clausa (found in riparian areas, esp. w/willow, semi-arid regions of the west).

While mentioned by Arora from California,
By: Daniel B. Wheeler (Tuberale)
2014-03-05 09:55:26 PST (-0800)

this likely is much more widespread. When I purchased Mushrooms Demystified in 1987, I asked David where he had found this (and Tuber separans). In return David photographed fresh Tuber species from Paul Bishop’s Tree Farm.

David said Geopora arenicola was not at all uncommon, but commonly overlooked in California. It looks so much like a hole in the ground, he named it that. Truffles are like that: far more are stepped on than found.

David also told me he had found the entire collection of T. separans under a single California live oak tree (photo 212). Odd other collectors from California have not reported it.

Created: 2014-03-04 20:10:42 PST (-0800)
Last modified: 2017-02-04 06:03:55 PST (-0800)
Viewed: 73 times, last viewed: 2018-07-03 13:32:38 PDT (-0700)
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