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.


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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On consultation
By: Christian (Christian Schwarz)
2011-09-09 11:25:29 NZST (+1200)

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 20:00:50 NZDT (+1300)

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

Mmm — pretty!

Re: Boletus amygdalinus
By: Christian (Christian Schwarz)
2009-11-22 19:44:42 NZDT (+1300)

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)
2009-11-22 16:08:49 NZDT (+1300)

Created: 2009-11-22 15:58:31 NZDT (+1300)
Last modified: 2015-12-17 13:46:18 NZDT (+1300)
Viewed: 176 times, last viewed: 2017-12-07 22:44:42 NZDT (+1300)
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