Observation 206380: Boletus bicolor var. bicolor
When: 2015-06-11
No herbarium specimen

Notes: In oak woods
Two collections shown.
Ref: Bessette, Roody & Bessette, North American Boletes


2015-06-11__ga_KR 010.jpg
Collection 1
2015-06-11__ga_KR 011.jpg
Collection 1
2015-06-11__ga_KR 012.jpg
Collection 1
2015-06-11__ga_KR 013.jpg
Collection 1
2015-06-11__ga_KR 014.jpg
Collection 1
2015-06-11__ga_KR 017.jpg
Collection 2
2015-06-11__ga_KR 018.jpg
Collection 2
2015-06-11__ga_KR 019.jpg
Collection 2
2015-06-11__ga_KR 020.jpg
Collection 2
2015-06-11__ga_KR 021.jpg
Collection 2
2015-06-11__ga_KR 022.jpg
Collection 2
2015-06-11__ga_KR 023.jpg
Collection 2
2015-06-11__ga_KR 025.jpg
Collection 2
“elongated pores near the stipe are distincive” ??

Proposed Names

63% (2)
Recognized by sight
71% (1)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Actually, the second to last photo is a cap section
By: Bill Sheehan (B_Sheehan)
2015-06-20 16:42:33 CDT (-0400)

but I dod not record the length of time after sectioning.

I didn’t section the shrooms
By: Bill Sheehan (B_Sheehan)
2015-06-20 16:39:40 CDT (-0400)

so don’t know about the slow staining.
Will next time!

Thinking B. bicolor var. bicolor
By: Arleen Bessette (MsMucor)
2015-06-20 16:30:22 CDT (-0400)

I believe this is, in fact, Boletus bicolor var. bicolor. B. bicolor var. subreticulatus is a good suspect, but ruled it out because the specimens lack apical reticulation. It is not B. pseudoboletinus (now called Xerocomus pseudoboletinus) because it lacks the cracked cap, is not reddish brown becoming darker brown in age, and the stalks lack coarse, brownish longitudinal ribs along their length.

Bill, I am wondering if your mushrooms had cap flesh that slowly & weakly stained bluish, especially at the junction of the stalk and cap? That would be a deal closer for sure!

I was about to propose…
By: Dave W (Dave W)
2015-06-13 11:25:37 CDT (-0400)

Boletus rubricitrinus, except the context appears to not stain blue on this collection.

I know…
By: I. G. Safonov (IGSafonov)
2015-06-13 00:24:37 CDT (-0400)

… it’s so tempting to call these B. bicolor, but they are clearly not that.
I thought these might be B. miniato-pallescens, but the stipes have way too much red.
The two collections might not even be the same species, unless they grew close to each other. In the future, preserving the material would be a good idea.

This section from different corners of the country is long overdue for a careful morphological/microscopic/DNA study…

Created: 2015-06-12 20:21:28 CDT (-0400)
Last modified: 2015-06-20 16:32:13 CDT (-0400)
Viewed: 117 times, last viewed: 2016-10-25 17:32:53 CDT (-0400)
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