Observation 47847: Scleroderma cepa Pers.

When: 2010-06-29

Collection location: Lands End, San Francisco, San Francisco Co., California, USA [Click for map]

Who: BakerSt10

No specimen available


[admin – Sat Aug 14 02:02:08 +0000 2010]: Changed location name from ‘Lands End, San Francisco,California,USA’ to ‘Lands End, San Francisco, California, USA’


Proposed Names

28% (1)
Recognized by sight: Growing with Monterey Pine & Cypress
56% (1)
Recognized by sight: Cracking peridium, probably a sterile base where the peridium is absent. If powdery consistency, then likely S. areolatum. If solid, S. cepa or other. Sclerodermas should be considered poisonous until proven otherwise. Be sure to wash your hands after handling.
84% (1)
Used references: Based on photos and description in “NATS Field Guide To Selected North American Truffles and Truffle-like Fungi”, by Matt Trappe, Frank Evans and James Trappe, c. 2005, published by The North American Truffling Society, Corvallis, Oregon; p. 59.

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= Observer’s choice
= Current consensus


Add Comment
Not nearby
By: BakerSt10
2010-07-01 09:13:44 CDT (-0500)

Sorry it’s about 30 miles & I would have to cross the bridge and they just raised the tolls.

You’re very welcome.
By: Daniel B. Wheeler (Tuberale)
2010-07-01 02:10:55 CDT (-0500)

But your comment was not what I was expecting to hear. Now I’m having second thoughts about the species. Solid typically refers to something similar to S. cepa or S. laeve, but both those species in my experience have much darker colored gleba (interiors). If these are nearby, could you dig the base and provide a photo of the fungus cut through the base?

A 110-pound pot-bellied pig died several years ago in Vancouver, WA after eating an unknown number of Sclerodermas in his yard. Pig and human physiolgy are so similar, that a human weighing the same amount eating the same quantity probably also would have died. Even immature Sclerodermas are known to cause extreme gastric upset. For more on the subject, read “Mushrooms: Poisons and Panaceas”.

Thanks Daniel!
By: BakerSt10
2010-06-30 08:31:56 CDT (-0500)

This one felt solid and not powdery. Did not know that some are poisonous.