Observation 140284: Boletus nobilis Peck

When: 2013-07-06

Collection location: Sweet Valley, Pennsylvania, USA [Click for map]

Who: Phil Yeager (gunchky)

No specimen available

On ground by Hickory, Ash, and White Pine. Brown to yellow-brown, convex to broadly convex caps, 28-100mm wide x 20-35 mm high. Pores cream to white and barely bruise light tan. Flesh white with no color changes. Tubes 2-16mm long and easily detachable. Stipe 50-115mm longand 11-24 mm diameter at the apex, white, equal to incrassate to clavate. Stipe context white, unchaging, texture ambiguous. Pores attached to depressed at apex. Terrestrial among White Pine, Ash, and Hickory. Taste mild. KOH results. cap neg., context neg., pores light tan, stipe yellowish tan, stipe context neg.
NH4OH results. cap yellowish-orange, contexr neg., pores neg., stipe yellowish, stipe context neg.
Fe2SO4 results: cap yellowish-orange, context neg., pores yellowish, stipe yellowish, stipe contex neg.

Proposed Names

32% (2)
Recognized by sight
64% (4)
Recognized by sight
47% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
The Oaks
By: Phil Yeager (gunchky)
2013-07-24 17:01:29 PDT (-0700)

Are mainly near the road as you enter this location. Also as you near the top of a slope, the ecosystem is much more diverse. with many more Oaks present.

By: I. G. Safonov (IGSafonov)
2013-07-24 16:35:07 PDT (-0700)

Now when you mentioned this, I noticed an oak leaf next to the mushroom. :)

My fault.
By: Phil Yeager (gunchky)
2013-07-24 15:55:06 PDT (-0700)

There area few Oaks in this ecosystem, but the predominant species are Hickory and Ash. Can’t see the trees because of the forest.

I have found that some types of mycorrhizal mushrooms…
By: Dave W (Dave W)
2013-07-22 04:33:02 PDT (-0700)

listed as oak associates also tend to appear in woods with hickory. Also, I see oak leaves in the photos. One spot where I have IDed B. nobilis is an oak/hickory forest.

I agree with Dave
By: I. G. Safonov (IGSafonov)
2013-07-20 21:50:41 PDT (-0700)

To me this looks like B. nobilis, too. The habitat is not where you would expect to find it, but it could me mycorrhizal with hardwoods other than oak and beech.

Given the association with hardwoods…
By: Dave W (Dave W)
2013-07-20 17:11:32 PDT (-0700)

I think B. nobilis seems reasonable. But macrochemical reactions seem to be more in line with B. edulis. I have identified eastern NA B. edulis in association with pine, but only in the autumn. Cap color seems a bit dark for B. edulis.

Created: 2013-07-17 14:55:17 PDT (-0700)
Last modified: 2016-02-18 15:50:03 PST (-0800)
Viewed: 94 times, last viewed: 2017-06-16 05:07:39 PDT (-0700)
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