Observation 218637: Pisolithus arhizus group

When: 2015-09-18

Collection location: Carmel Valley, Monterey Co., California, USA [Click for map]

36.387° -121.55° 536m

Who: Brian Bowers (bbowers)

No specimen available

Habitat notes: Erumpting from dry, compacted soil next to paved driveway surface outside Hastings Reserve Bunkhouse.

Key characters used to ID: Rounded sporocarp with crumbling dark yellow-brown peridium revealing mass of cinnamon-brown spores inside. Pleasant mushroom odor. Microscopic characters: “Spores 7–12 μm including ornamentation, globose, spinose…” (Desjardin and Wood, 2015). “Cinnamon-brown in mass” (per Deshardin and Brown) witnessed on same slide as microscopic photo below, but not evident in the provided microscopic view below.


Pisolithus arhizus group spores [40× objective lens × 10× optical lens = 400× total magnification]

Proposed Names

37% (3)
Used references: Tom Bruns
84% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Daniel B. Wheeler (Tuberale)
2015-10-12 21:05:34 PDT (-0700)

present in blow-up.

Hope you didn’t inhale strongly: could be bad for your health. Same as inhaling any puffball spores.

Created: 2015-10-12 13:18:35 PDT (-0700)
Last modified: 2015-10-18 07:47:32 PDT (-0700)
Viewed: 53 times, last viewed: 2017-12-02 02:00:43 PST (-0800)
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