Observation 74523: Boletus pseudosensibilis A.H. Sm. & Thiers
When: 2011-08-13
No herbarium specimen
0 Sequences

I am a bit more comfortable putting a name onto this bicolor group bolete based on its looks and the outcome of macrochemical tests. It was groung on a mossy patch in the middle of a wide trail with oaks on either side. This one did not have the odor characteristic of B. sensibililis, but since these specimen duo is young, perhaps lack of such odor should not be taken too seriously. The rest of details is provided under each photo.


Staining of the pileipellis with ammonia (aq). The vapor immediately stains the cuticle purplish-blue; the liquid stains it yellow-brown
The context stains blue immediately upon exposure to air. Picture taken with a flash.
Application of 3% KOH (aq) produces a yellow-brown stain. Picture taken without a flash.
The blue staining is gradually turning reddish-brown; picture taken 20 min following dissection.

Proposed Names

57% (1)
Eye3 Eyes3
Used references: “North American Boletes” by Bessette-Roody-Bessette

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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I agree wholeheartedly
By: Bill (boletebill)
2011-08-24 10:27:55 JST (+0900)

this mushroom has the look of what I understand B. pseudosensibilis to be. No smell, olive tones to the cap, blues ib cut flesh, shallow tubes.

This may be
By: Dave W (Dave W)
2011-08-24 09:52:03 JST (+0900)

the same as what I had been finding a lot of a couple weeks ago.


Created: 2011-08-24 04:32:01 JST (+0900)
Last modified: 2011-08-24 04:33:49 JST (+0900)
Viewed: 107 times, last viewed: 2017-09-17 21:02:35 JST (+0900)
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