Observation 27681: Suillus caerulescens A.H. Sm. & Thiers
When: 2009-10-29
No herbarium specimen

Notes: Initially I was going to call these Suillus caerulescens or Suillus ponderosus. However, they didn’t exactly look like what I normally see in the northern Californis Bay Area.
The spores were so un-boletinoid that I thought I had mixed my records. Suillus imitatus apparently does have elliptical spores in the range that I saw ( approx. 7.6 X 4.5 microns, shorter than the S. caerulescens.
Also, these do fit the description in Thiers for the most part, including being faintly reticulate above the annulus. I did not note any bluing on the flesh of the lower stipe but I didn’t really specifically check for it at the time.
The habitat for this species is spruce and fir forests which this area was.

[admin – Sat Aug 14 02:01:29 +0000 2010]: Changed location name from ‘J. Smith State Park, Del Norte Co., California’ to ‘Jedediah Smith State Park, Del Norte Co., California, USA

Proposed Names

61% (2)
Eye3
Used references: California Mushrooms; H. Thiers
74% (1)
Eyes3
Recognized by sight: DNA evidence shows that this S. immitatus is really just a form of S. caerulescens. There is a bit of dry veil I can see so that adds to my confidence in calling this S. caerulescens.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-11-02 21:46:24 PST (-0800)
Last modified: 2011-11-15 15:49:23 PST (-0800)
Viewed: 72 times, last viewed: 2016-03-22 14:39:50 PDT (-0700)
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