When: 2008-07-14

Collection location: Petaluma, Sonoma Co., California, USA [Click for map]

Who: Darvin DeShazer (darv)

No specimen available

Spores spiny, 8-11 µm.
Gleba purplish but aging grayish brown as seen in first & last photos.

Species Lists


Proposed Names

-56% (2)
Used references: Trial field key to the species of SCLERODERMATACEAE in the Pacific Northwest
74% (2)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
Not a perfect key
By: Irene Andersson (irenea)
2008-07-16 09:44:21 PDT (-0700)

Darv, I used the same key, and went straight on S. cepa, because I considered it smooth, not scaly. Funny that the description afterwards describes S. cepa like this: “Peridium thin (1-2 mm); when mature forms large irregular scales over top by cracking of surface”.
A key doesn’t work well when “scales” means different things at different occasions.. but I think any key is useful, as long as it covers all the known species and is followed by good descriptions (and preferably pictures too).

Scleroderma cep
By: Darvin DeShazer (darv)
2008-07-15 22:01:37 PDT (-0700)

Scleroderma cepa did not fit well in the key because of the cracks in the peridium and the color of the gleba, but considering the stem it looks like a better fit. We could use a better key for the West Coast of the USA.

Very small stem
By: Irene Andersson (irenea)
2008-07-15 07:23:35 PDT (-0700)

Not verrucosum with such smooth surface and tiny “stem”. Why not S. cepa?