Observation 78114: Boletus calopus var. frustosus (Snell & Dick) Miller & Watling

When: 2011-10-04

Collection location: Caples Lake, Alpine Co., California, USA [Click for map]

Who: christopher hodge (christopher hodge)

No specimen available

Found at in lodge pole pine, red fir, alder. bruising blue, yellow pores.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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It should be B. frustosus
By: Dimitar Bojantchev (dimitar)
2011-10-07 15:26:51 CDT (-0500)

This specie was wrongly demoted into a varietal rank of B. calopus — which is a big and very obvious mistake as they do not look quite similar at all and I know both well. The molecular data supports the speciation too. Someone has to simply put a quick paper together and straighten the matter…

apparently B. coniferarum is a PNW species…
By: Debbie Viess (amanitarita)
2011-10-06 16:32:16 CDT (-0500)

with a darker cap than calopus when young, less pronounced reticulation and no red on the stipe (as Christian mentioned). Rubripes has a smooth stipe, completely red in age, and w/out reticulation.

They all have yellow pores.

Photos of all three in the Bessettes Book, as well as descriptions in Thiers, and a nice treatment of coniferarum in “Mushrooms of the PNW” by Trudell and Ammirati.

It’s better with bitter?

Good to know!
By: christopher hodge (christopher hodge)
2011-10-06 14:32:27 CDT (-0500)

I am still becoming acquainted with high country boletes as well. Been finding B. edulis var. grandedulis for a couple weeks now in lodgepole pine-aspen forest. You should encounter some good specimens with all this precipitation we are gratefully receiving. Good Luck!

By: Christian (Christian Schwarz)
2011-10-06 14:01:33 CDT (-0500)

Also doesn’t have that much red (or any) on the upper stipe, from what I’ve heard.
I hope to find both when I head up to the North Sierra soon.

I was
By: christopher hodge (christopher hodge)
2011-10-06 12:19:12 CDT (-0500)

debating between B. calopus and B. coniferarum, but i guess coniferarum has whiter tubules than this specimen. The reticulation on the stalk is indicative that is isn’t B. rubripes from what I have read. Thanks for the input!

One of the bitter boletes
By: Christian (Christian Schwarz)
2011-10-06 09:44:08 CDT (-0500)

B. calopus or perhaps B. rubripes, although the latter may have a paler cap – I don’t have field experience with it.

Created: 2011-10-05 22:29:04 CDT (-0500)
Last modified: 2012-06-01 12:10:49 CDT (-0500)
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