Observation 18122: Boletus edulis Bull.

When: 2008-07-17

Collection location: Mammoth, Pennsylvania, USA [Click for map]

Who: John Plischke (John Plischke)

No specimen available


[admin – Sat Aug 14 02:02:35 +0000 2010]: Changed location name from ‘Mamouth Pennsylvania’ to ‘Mamouth, Pennsylvania, USA’


Proposed Names

56% (3)
Recognized by sight
64% (3)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
By: Dave W (Dave W)
2009-02-10 07:49:42 CST (-0500)

My assumption is that listing a proposed species name along with a low level of confidence should be enough to inform the reader that this amounts to a guess. Often I insert the word “guess” into my comments. Let’s face it, aside from a few really easy ones, IDing mushrooms from photos and accompanying descriptions of macroscopic traits generally amounts to guessing. But, each such guess gives the collector another possibility to check, which may actually eventually amount to something.

John, you mentioned B. subcaerulescens… Did you observe some bluing?

Oh, BTW, Dave W and Dave in NE PA are each the same person, me. I registered separately on two different computers.

By: John Plischke (John Plischke)
2009-02-10 01:21:33 CST (-0500)

The mushrooms were growing under spruce, At first I was think B. edulis then changed my mind to B. subcaerulescens then the cap color did not look right so I gave up. lol

By: Christian (Christian Schwarz)
2009-02-09 23:12:49 CST (-0500)

Looks like B. chippaewaensis has more of a tawny-pink stipe and yellow pores at maturity.

I think Noah’s points on this observation are the best to consider – this group is a mess, and applying obscure names rather than general names is more likely to make the mess worse.

So, because the observation is similar to a broad-concept of B. edulis (and because this is widely recognized as a group of multiple spp. in need of differentiation), it is somewhat informative to call it that for now.

Alternatively, if we call it B. chippaewaensis (which would be a very specific determination) someone might think we positively identified it (unless they read the wall, or look at the confidence votes)…

By: Dave W (Dave W)
2009-02-09 21:19:27 CST (-0500)

I just attempted to create the name Boletus chippewaensis (see Bessette/Roody/Bessette). But the name was not recognized by this site. Here are my reasons… nearly equal stipe diameters, reddish tones on caps, relatively long stipes, tubes depressed nearby where stalk joins cap. Having written this, like Noah says, there are so many macroscopic edulis “types” (whatever that means) and so many edulis (type) environments here in the eastern US, that arriving at any consensus regarding IDing one of these Kings to “species” can be a fairly dubious undertaking.

edulis group
By: Noah Siegel (Noah)
2009-02-09 19:43:20 CST (-0500)

I gave up years ago trying to figure out what’s what in this mess. In the east we have one that grows under Norway Spruce that looks like and may be B. edulis. We also have umpteen others that are similar, but different…maybe. We have hemlock kings, oak kings, birch kings, White Pine kings (some of which are probably B. clavipes) and the list goes on and on.
Until it is all sorted out its Boletus edulis group as far as I’m concerned

B. edulis var. grandedulis
By: Christian (Christian Schwarz)
2009-02-09 18:56:22 CST (-0500)

B. edulis var. grandedulis has cinnamon-brown pores at maturity, and the specimen at right seems fully expanded with no sign of darkening pores. Also, the cap of B. edulis var. grandedulis is often reddish-brown. Furthermore, although the north-south distribution of var. grandedulis is not clear, it is distinctly Western.

What happened to var. grandedulis?
By: Irene Andersson (irenea)
2009-02-09 15:44:37 CST (-0500)

I don’t know the variations in cap colour of your edulis, I just know that this is not within the range of colours in the original (european) edulis.

Cap color
By: Nathaniel Segraves (nlsegraves)
2009-02-09 15:32:02 CST (-0500)

I agree that the reddening of the mature specimen is closer to B. edulis. It would be good to have more info on habit and some more macro-features to evaluate.

B. nobilis
By: Christian (Christian Schwarz)
2009-02-09 14:36:50 CST (-0500)

As far as I can tell, B. nobilis isn’t this orange, and has a more wrinkled cap. This observation does look a little different from my image of classic B. edulis, perhaps this is one of its “forms”.

What about Boletus nobilis?
By: Nathaniel Segraves (nlsegraves)
2009-02-09 12:57:41 CST (-0500)