Observation 33090: Boletus mendocinensis Thiers.

Proposed Names

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Recognized by sight
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Recognized by sight

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Comments

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you make some good points Christian…
By: Debbie Viess (amanitarita)
2010-02-03 22:17:28 CST (-0500)

but I don’t think that the precise ID is resolveable at this point.

maybe we should actually collect and voucher these various, curious maybe mendocinensis?

you make some good points Christian…
By: Debbie Viess (amanitarita)
2010-02-03 22:15:34 CST (-0500)

but I don’t think that the precise ID is resolveable at this point.

maybe we should actually collect and voucher these various, curious maybe mendocinensis?

Well, maybe it is B. mendo…
By: Christian (Christian Schwarz)
2010-02-03 21:23:10 CST (-0500)

…Which, just to be clear for everyone watching at home is actually in the same cluster as Boletus/Xerocomus chrysenteron/truncatus, so when voting, keep in mind that Xerocomus sp. doesn’t exclude B/X. mendocinensis.

My reading of the treatment of B. mendo in Thiers matches well on a number of counts:
Evenly brown tomentose to velutinous areoles, no red in the cracks, brown-over yellow stipe with red at the apex (mentioned specifically, albeit as an occasional phenomenon).

The color of the tubes can be reconciled as unevenly matured – Thiers notes that the tubes are yellow, and the pores are orange/red.

So, we can’t really know without a bit more work, but I don’t think there is any evidence that necessarily precludes X/B. mendocinensis (which appears to be an inconsistently interpreted entity).

Agree with Xerocomus sp.
By: Christian (Christian Schwarz)
2010-02-03 17:05:08 CST (-0500)

but I am not sure that the Xerocomus in the observation you linked is X. chrysenteron either – the cap is very even and dark, and the stem is robust and almost entirely red. Looks more like X. truncatus type, at least based on material from around Santa Cruz.

I don’t think so…
By: Debbie Viess (amanitarita)
2010-02-03 10:47:17 CST (-0500)

the “red pores” described in Thiers book for mendocinensis are a very different color red: jasper or dragon’s blood. both colors have an orange not a pink cast. some of the pores shown here are still yellow. I suspect some sort of color artifact.

you can also see some reddish pores in this example of chrysenteron:

http://mushroomobserver.org/image/show_image/72362?obs=31278&search_seq=1252803&seq_key=981516

the stipe as described for mendocinensis has a yellow background with brown fibrils that create a brownish cast. red coloration on the stipe seems to be variably present in many of the Xerocomus.

on the other hand, this one is not a neat fit for dryophilus, either, which was another name proposed at the Pt. Reyes FF.

and nobody saved it to go deeper. pity.

I vote Xerocomus sp.

Created: 2010-02-02 23:40:39 CST (-0500)
Last modified: 2010-02-02 23:40:39 CST (-0500)
Viewed: 137 times, last viewed: 2016-10-27 02:57:51 CDT (-0400)
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