Observation 28604: Suillellus amygdalinus (Thiers) Vizzini, Simonini & Gelardi

When: 2009-11-21

Collection location: Jack’s Peak Park, Monterey Co., California, USA [Click for map]

Who: Christian (Christian Schwarz)

Specimen available

I really cannot tell what these are. Any ideas?

I’ll do some microscopy tomorrow.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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On consultation
By: Christian (Christian Schwarz)
2011-09-08 19:25:29 CDT (-0400)

with David A., I think this is just one of the pale morphs of B. amygdalinus.
He notes that it is an extremely variable species, with colors particularly sensitive to canopy cover.

I wondered
By: Paul Derbyshire (Twizzler)
2009-11-22 02:00:50 CST (-0500)

what Ceanothus was, so I pasted it into google image search.

Mmm — pretty!

Re: Boletus amygdalinus
By: Christian (Christian Schwarz)
2009-11-22 01:44:42 CST (-0500)

I certainly considered it as the most likely candidate, but:
The pores on this collection start distinctly yellow and become orange, at most reddish-orange.
The stipe is largely pale yellow, and less firm and bulbous or tapered as in typical B. amygdalinus.
The habitat was largely dominated by Monterey Pine, with Ceanothus nearby, and a small coast live oak at distance (although probably close enough to be a host).
However, looking at Nathan Wilson’s (presumably) southern examples versus some of the more solidly red, tapered-stemmed photos on the species’ site at MykoWeb, suggests that there may be two forms of this going on in CA.
Microscopy tomorrow in the AM.

By: Debbie Viess (amanitarita)
2009-11-21 22:08:49 CST (-0500)

Created: 2009-11-21 21:58:31 CST (-0500)
Last modified: 2015-12-16 19:46:18 CST (-0500)
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