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Observation 470062: Suillus Gray

When: 2021-09-25

Collection location: Gordonville, Michigan, USA [Click for map]

Who: Eric (eozkan)

No specimen available

Collected this mushroom growing in grass beneath a line of spruce trees on the side of a rural road. Appears to be Suillus. Would appreciate help with further identification.


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Please note my recent OBS 470338 where I collected additional specimens of this…
By: Eric (eozkan)
2021-09-27 16:45:17 CDT (-0500)

…mushroom from the discovery site to confirm habitat. I was able to spend more time and collected better quality specimens as well as confirming presence of spruce vs. pines. A spruce-loving Suillus?

It’s very possible Igor, these were found in front of a line of planted spruce trees…
By: Eric (eozkan)
2021-09-26 22:13:09 CDT (-0500)

…shielding a rural home from the road but there certainly could have been pines mixed in or behind the line of trees I could see. The next time I’m passing by this location I’ll have to take a closer look. This was one of those informal collections that I spotted from a car while passing by…causing my passengers much consternation as I had to pull over, run across the road to make the collection, and get back under way as quickly as possible.

Re the ID and habitat
By: I. G. Safonov (IGSafonov)
2021-09-26 21:49:12 CDT (-0500)

To my knowledge, Suillus is not associated with spruces. The reported hosts are larch, various pines (2-3 needle “hard” pines and 5-needled “soft” pines) and sometimes hemlock (Tsuga) , and oak (for S. subaureus). Are you sure there were no pines nearby, Eric? Aren’t there pine needles in the pix?
IDK what this is because I think I can eliminate all known eastern NA ringless species {americanus, brevipes, glandulosipes (=neoalbidipes), hirtellus, placidus, subaureus, tomentosus and weaverae; did I miss any?}.