Observation 160660: Boletus barrowsii Thiers & A.H. Sm.

When: 2014-03-02

Collection location: UC Berkeley Campus, Berkeley, California, USA [Click for map]

Who: Timothy Sakhuja (tsakhuja)

No specimen available

Under an ornamental spruce.



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Recognized by sight

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I have collected what I believed to be B. barrowsii here before
By: CJ (MycoAddict)
2014-03-07 14:05:10 CST (-0500)

Just to add more data points for this observation- I know where this collection was made and I have collected B. barrowsii at this location sporadically for the past couple years. It is a regular fruiting that unfortunately usually gets stepped on before it can reach this level of maturity. I don’t have access to any of my photos of previous fruiting bodies at the moment, but I can dig them up later if there is interest.

By: Byrain
2014-03-07 11:30:20 CST (-0500)
I believe you Christian…
By: Debbie Viess (amanitarita)
2014-03-07 10:58:29 CST (-0500)

it was more Tom’s concern than mine. Perhaps when they grow clustered like this there is not such a clear abscission break? The normal form, of course, resembles an edulis in its base roundedness.

Everything else fits neatly, IMO.

Or…could there be yet another cryptic species here? One that differs from the standard SW form? Who knows?

Dude, where’s my tricorder?

Clustered growth
By: Christian (Christian Schwarz)
2014-03-06 18:50:58 CST (-0500)

(and the incidental pointed bases) are regularly found in fruitings from a mycelium under tanoak and Live Oak on the UCSC Campus.

clustered at the base?
By: Debbie Viess (amanitarita)
2014-03-06 17:55:18 CST (-0500)

were the bases also pointed rather than bulbous like an edulis?

taste mild to nutty?

anyone have the original write-up for barrowsii that they could share?

that clustered habit and pointed base are off for my concept of the species. Tom Bruns recently collected more of this, and reiterated those odd details: clusters with a pointed base.

otherwise, dead ringer for barrowsii.

nice to see boletus in March…
By: Debbie Viess (amanitarita)
2014-03-03 12:19:36 CST (-0500)

we sure missed ’em in November! (and Dec. and Jan. and…).

So much for “seasonal restricted” fruitings! Gotta take that moisture when you can… ;)

live oak is a common CA host for this mushroom.
By: Debbie Viess (amanitarita)
2014-03-03 12:17:29 CST (-0500)

It often pops up in the Santa Cruz area, but this may well be a first for UCB!

If it is not up on Mykoweb, that just means that neither Fred nor Mike have found it yet! They only describe and document what they have actually seen…

We have also found what apparently is B. barrowsii in Marin CO.

It does indeed occur in California.

could have been oak
By: Timothy Sakhuja (tsakhuja)
2014-03-03 02:10:58 CST (-0500)

There were many live oak trees in the area, though this cluster was definitely near the base of a planted spruce. It’s certainly possible that it was actually growing with oak.

By: Andrew Heath (Quercus)
2014-03-03 01:58:12 CST (-0500)

Something similar to, if not the real B. barrowsii has been showing up all over with all sorts of host trees including Live Oak in CA and White Oak and planted Linden, Elm, and Hornbeam in the PNW. Spruce is a new one to me though.

Found a reference
By: Terri Clements/Donna Fulton (pinonbistro)
2014-03-03 01:52:35 CST (-0500)

in Wikipedia that it is known to occur under coast live oak in California.

Blue Spruce?
By: Andrew Heath (Quercus)
2014-03-03 01:49:18 CST (-0500)

Interesting.. I don’t think either the B. barrowsii equivalent outside the SW or the true B. barrowsii are known to grow with Spruce..

Is B. Barrowsii
By: Terri Clements/Donna Fulton (pinonbistro)
2014-03-03 01:48:47 CST (-0500)

known to occur in California? No reference in Mykoweb. Known from the southwest under ponderosa pine.


By: Timothy Sakhuja (tsakhuja)
2014-03-03 01:26:28 CST (-0500)

Under an ornamental spruce (probably blue spruce).

Definite reticulation. I added another picture where the reticulation is more apparent.

Reticulation on stem?
By: Terri Clements/Donna Fulton (pinonbistro)
2014-03-03 01:17:52 CST (-0500)
Nice find!
By: Andrew Heath (Quercus)
2014-03-03 01:12:50 CST (-0500)

Sure looks like it.. Growing with what tree?

Created: 2014-03-02 23:53:57 CST (-0500)
Last modified: 2014-03-03 12:19:54 CST (-0500)
Viewed: 199 times, last viewed: 2018-06-24 00:45:59 CDT (-0400)
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