Observation 167510: Boletus variipes Peck

After 4 years of looking – I seem to have finally found one on Fathers Day…,

Two specimens, one young, one old, one under pine the other nearby, cap brown, pores white when young yellow-dull olive in age. Gills stain tan to brown when scratched. No bluing. Stipe with distinct white reticulation on both specimens. Both also wormy. Context white, taste mild to sweet, odor mushroomy, rich, non staining. Context unchanging in KOH, NH4OH, FESO4. Cap stained brown to orange brown with KOH on surface.

Species Lists


Pines here, Oaks, ash, tulip, and beech beyond

Proposed Names

-20% (3)
Recognized by sight
58% (6)
Recognized by sight
13% (2)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
Great comments!
By: Martin Livezey (MLivezey)
2014-06-17 15:34:50 MST (-0700)

I am delighted whether this is called B. varipes or B. edulis. I have the specimen, so maybe I will be able to sequence it. The take home is that this is a safe edible species – great to find it so close to home.

I agree with Walt.
By: Noah Siegel (Noah)
2014-06-17 05:44:51 MST (-0700)

This is classic B. variipes.

Even though variipes is a true Boletus, I wouldn’t consider it in the B. edulis group; instead using that name for the very closely related (mostly conifer associated)species clustered about _B. edulis.

By: walt sturgeon (Mycowalt)
2014-06-16 19:59:13 MST (-0700)

I disagree. Classic B.variipes.

B. edulis group — doubtful?!
By: I. G. Safonov (IGSafonov)
2014-06-16 18:24:35 MST (-0700)

Give me a break, Walter!
This mushroom is definitely in the porcini clade, i.e. the true Boletus. Last time I checked B. variipes did belong to the porcini, too (Dentinger et al., 2010; Nuhn et al., 2013). But you don’t know to a certainty that this one is variipes unless you sequence it. That’s why I think Boletus edulis group is a more accurate name for the time being.

The area is predominately oaks -
By: Martin Livezey (MLivezey)
2014-06-16 16:20:49 MST (-0700)

and nice big ones! Most of these mushrooms were under pine in mowed lawn adjacent to a busy street in land designated as a park. The one smaller one was closer to the woods and probably under oak. Nonetheless, the 4 or 5 larger ones were under a two needle pine at least 40’ high. My guess Peterson Field Guide is Red or Norway Pine, but I am not sure. The macro-chemical tests were done when I got them home – after a picnic and ride home, so the mushrooms were a few hours old, still done on fresh surfaces. Reactions were closer to B. edulis than to varipes according to BRB. My suspicion is that the character of the cap (round, dull brown, w/o a brighter margin) and the lack of a depression in the pores at the stipe are the reasons for the confidence in B. varipes by our voters.

Congrats, Martin
By: I. G. Safonov (IGSafonov)
2014-06-16 09:38:15 MST (-0700)

Boletus variipes is found under hardwoods. Reports of mycorrhizal association with conifers are erroneous according to Kuo. Are you sure there were no oaks in the vicinity? KOH on cap also points away from variipes.