Observation 81429: Suillus weaverae (A.H. Sm. & Shaffer) Kretzer & T.D. Bruns

When: 2011-09-25

Collection location: Camp Sequanota, Somerset County, Pennsylvania, USA [Click for map]

Who: Martin Livezey (MLivezey)

No specimen available

Growing by the edge of a driveway under white pine near a bonanza of Amanita muscari var. Guessowi and Suillus americanus. But these boletes were distict. The pores are tan and less like aligned like gills than the more yellow S. americanus. The cap is tan to reddish-brown, not bright yellow. But the most interesting characteristic is the possible association with the Amanita in the last two photos.

Proposed Names

57% (1)
Recognized by sight
55% (4)
Recognized by sight
83% (1)
Recognized by sight: The North American “S. granulatus” is S. weaverae
Used references: Nguyen, N., Vellinga, E. C., Bruns, T. D., & Kennedy, P. (2016). Phylogenetic assessment of global Suillus ITS sequences supports morphologically defined species and reveals synonymous and undescribed taxa. Mycologia, 16-106.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: walt sturgeon (Mycowalt)
2011-11-04 09:51:02 CDT (-0500)

There are lots of possibilities and unknowns about when, where and why fungi fruit. When conditions are optimal as they were at Sequanota fungi fruit luxuriantly and at times touching each other. This year I saw a cluster of the non mycorrhizal Clitocybe subconnexa with an unidentified bolete fruiting being squeezed right in the center of the large cluster.

Thanks for the ID Walt and your comments Jason.
By: Martin Livezey (MLivezey)
2011-11-04 06:37:59 CDT (-0500)

I will follow up with the manuals

Both appear to be mycorrhizal on the same pine tree and the association can be purely accidental – that is they just happen to be side by side. But it begs the question – is there something going on down there? They both look healthy. As the overlapping mycelial web of each critter chose nearly the same spot to send up the fruiting body I wonder if there is something special about that spot.
Maybe something dented the ground or maybe a concentration of pine rootlets.

Possible association:
By: IntoTheFlames
2011-11-03 22:39:54 CDT (-0500)

= happenstance.

The association
By: walt sturgeon (Mycowalt)
2011-11-03 20:52:20 CDT (-0500)

is most likely that they are both mycorrhizal with the same pine tree.

Created: 2011-11-03 20:27:15 CDT (-0500)
Last modified: 2016-12-21 16:26:40 CST (-0600)
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