Observation 255512: Boletus edulis group

When: 2016-10-01

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

Who: Dave W (Dave W)

No specimen available

A few years ago this topic was discussed on MO… blue-staining edulis. These are definitely not B. subcaerulescens. The collection site is the same as where I have collected edulis under Norway spruce for many years.

There was also bluing on the cap context; area where cap context meets tubes.

Wet conditions shortly after rainfall.


Proposed Names

87% (1)
Recognized by sight
56% (1)
Recognized by sight: Color of the pileus, yellow pore surface and pinkish-cinnamon staining of the pore surface
Used references: North American Boletes by Bessette-Roody-Bessette

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= Observer’s choice
= Current consensus


Add Comment
There was also bluing…
By: Dave W (Dave W)
2016-10-07 17:43:13 EEST (+0300)

on the context, where it meets the tubes. I noticed this when I stripped the tubes of some of the more mature ones (while preparing to put into the dehydrator). The bruising is more blue than the photo indicates. Photo was snapped well after the sun had set, indoors. (I didn’t notice bluing before then.)

Found on a lawn with mature Norway spruce and white pine. Collected not long after significant rainfall. I have made many other collections of King Boletes from this location. If any of the others from this spot have stained blue, it was a loooong time ago. (I have seen this with edulis types before, don’t remember if any came from this spot.)

By: John Plischke (John Plischke)
2016-10-07 08:06:52 EEST (+0300)

There has been a number of reports of them bluing neat the stalk but this one looks like it bruises all over the pores