Observation 24056: Boletus orovillus Thiers & Kowalski
When: 2009-08-06
No herbarium specimen

Proposed Names

-29% (4)
Recognized by sight
63% (8)
Eye3 Eyes3
Recognized by sight
-60% (5)
Used references: North American Boletes by Bessette, Roody, and Bessette.
-35% (5)
Eye3
Recognized by sight: on wood chips; bright yellow cap and stipe; reddening on stipe. sometimes blues.
Buchwaldoboletus is the new, improved genus name for this species on Index Fungorum. B. sphaerocephalus is a synonym, but its description does not include a reddening stipe.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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we still need to examine the dessicata on these specimens.
By: Debbie Viess (amanitarita)
2009-10-13 10:47:51 CDT (-0400)

Wood is looking at East Bay material; these are in Santa Cruz. Let’s go a bit deeper under the surface before we make any final determination on this particular collection.

Correction
By: Darvin DeShazer (darv)
2009-10-10 15:05:00 CDT (-0400)

Ah, a correction & a vindication for the Bolete book by Harry Thiers: It seems the type specimen deposited in the H.D. Thiers Herbarium at SFSU has red pores. Mike Wood has had the opportunity to follow the growth of these on a pine stump or in wood chips for the past several years and says “The younger material almost never shows red in the pores, but it is the normal condition in older material to show at least some red in the pores…ranging from a little red to all red.”

Just checking to see if any new information has been collected for this Fungi?
By: kate (kate)
2009-10-08 17:37:11 CDT (-0400)

I am curious to know if you have new information leading to a difinitive name for this Fungi? Boletus finds are most interesting and this one has my interest. Kate

alright
By: Shane Marsh (Mushane)
2009-08-31 11:19:39 CDT (-0400)

school has begun so forgive me if it takes a few to get this specimen out deb.

nice mature specimens!
By: Debbie Viess (amanitarita)
2009-08-31 11:13:57 CDT (-0400)

I definitely want one.

UPDATES
By: Shane Marsh (Mushane)
2009-08-22 01:57:40 CDT (-0400)

red stem staining and orange pore staining with damage that has aged
blue staining immediately, which goes away with time, and then is ready to bruise blue again at the slightest touch

I have a few mature specimens that will be available for the first few interested once dried.

Buchwaldoboletus . . .
By: Roy Halling (royh)
2009-08-21 10:44:32 CDT (-0400)

A-rita asked that i weigh in on this genus. Buchwaldoboletus sphaerocephalus is an accepted name in Index Fungorum for a bolete that was originally described in Europe. Does this mean it is universally accepted? No, it doesn’t, but it is a consensus opinion based on what is known for that taxon as it occurs in its original geographic range. Molecular data of which I am aware does not shed any additional light on the matter, but I have not made an exhaustive search on this latter topic.

PLEASE collect this and dry it too, Mushane!
By: Debbie Viess (amanitarita)
2009-08-21 09:57:38 CDT (-0400)

otherwise, we’ll all be conjecturing til the cows come home.

hmm
By: Shane Marsh (Mushane)
2009-08-20 23:54:17 CDT (-0400)

ill have pics of mature specimens soon

A “novel” approach…
By: Roy Halling (royh)
2009-08-20 23:07:14 CDT (-0400)

Since you folks around the SF Bay area are in close proximity to the herbarium at SFSU (also called the HD THiers herbarium), why not properly document the collection and go to SFSU and compare it with known collections of orovillus and sphaeocephalus? Just a thought . . .

hard to believe that some are sticking with orovillus as an ID…
By: Debbie Viess (amanitarita)
2009-08-18 19:43:53 CDT (-0400)

since two important features, yellow pores and a reddening stipe, are missing from the original description by Thiers. what is the justification for persisting in this ID?
goodness knows I hate all of the name changes too, but if indeed this is one of the rare non-MR boletes, then it is no longer a Boletus, either.
We could use a mature specimen for further ID on this one Mushane.

No wonder; Boletus orovillus is considered a synonym of Boletus hemichrysus now.
By: Gerhard Koller (Gerhard)
2009-08-18 19:36:08 CDT (-0400)
I agree with your reasoning Ron.
By: Debbie Viess (amanitarita)
2009-08-18 11:54:09 CDT (-0400)

These curious yellow boletes do not have reddish decurrent pores, just reddish color on the stipe. The Bessettes Big Bolete Book sez that hemichrysus and sphaerocephalus are considered “by some authors” to be synonyms; Index Fungorum is silent on this topic. Orovillus is nowhere to be found in the modern literature, altho it is listed (in blue, not current name green) on Index Fungorum.

Curiouser and curiouser…
By: Ron Pastorino (Ronpast)
2009-08-18 11:37:13 CDT (-0400)
One might make the argument that if you take away the red pores from Boletus orovillus, you basically have the description for Boletus sphaerocephalus. Also, if it is now accepted that the non-mycorrhizal boletes are now “Buchwaldoboletus” I would still vote for “Buchwaldoboletus sphaerocephalus” , which is recognized by Index Fungorum. The Boletus hemichrysus/Buchwaldoboletus hemichrysus has very distinct decurrent, reddish-brown pores http://mushroomobserver.org/3174?search_seq=693068 I didn’t see them listed as synonyms in Index Fungorum.
Boletus orovillus
By: Darvin DeShazer (darv)
2009-08-18 09:18:48 CDT (-0400)

Boletus orovillus is known from the coast. Fred Stevens has described it with a monterey pine stump. Also the red pores is an error in the Thiers bolete book. The few fruiting bodies I’ve seen over the years did NOT have any hint of red in the pores.
Photos and description

Perhaps Boletus sphaerocephalus..
By: Ron Pastorino (Ronpast)
2009-08-17 23:24:53 CDT (-0400)
is more likely. According to Bessette et al they grow in “…groups or clusters in sawdust, or on stumps or the surrounding soil.” The spore print should be olive-brown for that species and often with yellow basal mycelium.
redwood wouldn’t be a MR host…
By: Debbie Viess (amanitarita)
2009-08-17 22:53:48 CDT (-0400)

don’t know about your fir…how far away is it?
IF it is one of the curious woodrotting, non-MR boletes, the wood chips will actually be warm. feel below the fruit bodies with your hand…

no idea
By: Shane Marsh (Mushane)
2009-08-17 22:32:35 CDT (-0400)

im stumped, im gonna water it and come back in a few days to see how that huge cluster is doing, ill cut some in half etc
I wanna get some shots of the mature fruits.

I think there was redwood nearby, probably a douglas fir way up in the air, but they were probably growing directly from the chips.

was this in pure woodchips or under a tree?
By: Debbie Viess (amanitarita)
2009-08-17 22:30:29 CDT (-0400)

there is a bright yellow Bay Area woodrotting bolete that looks a lot like this one…except it grows in clusters and doesn’t stain blue.

Interesting find
By: Ron Pastorino (Ronpast)
2009-08-17 21:04:13 CDT (-0400)

Boletus orovillus has red pores. Boletus pseudosulphureus and another candidate, Boletus sphaerocephalus, aren’t known in California. The latter has reportedly been found in Idaho according to “North American Boletes”. The former apparently hasn’t been seen west of Texas.

B. orovillus not near Oroville?
By: Nathan Wilson (nathan)
2009-08-17 20:22:00 CDT (-0400)

The habitat is pretty different. Have you seen this species before in coastal California rather than the Sierra foothills?

Isn’t this the Boletus pseudosulphureus ss.amer.auct.?
By: Gerhard Koller (Gerhard)
2009-08-07 11:53:52 CDT (-0400)

It also could be a Pulveroboletus.

Created: 2009-08-07 00:44:38 CDT (-0400)
Last modified: 2009-08-07 00:44:38 CDT (-0400)
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