Observation 196156: Suillus tomentosus (Kauffman) Singer

When: 2015-01-07

Collection location: Coastal Sonoma Co., California, USA [Click for map]

Who: Terri Clements/Donna Fulton (pinonbistro)

No specimen available

On ground in mixed woods—redwood, tanoak etc.

Proposed Names

29% (1)
Eye3 Eyes3
Recognized by sight: yellowish cap, pores, stem, and flesh, bluing
Based on chemical features: KOH orange on cap
20% (3)
Recognized by sight: or maybe S. tomentosus because of stronger bluing reaction?

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
That helps alot,
By: Terri Clements/Donna Fulton (pinonbistro)
2015-01-13 19:22:55 PST (-0800)

these were with Bishop pine, 2 needle, so S. tomentosus seems more likely as there is no 3 needle pine in the area from what I’m told. Also, the sparse fibrils are more red than brown and the cap yellowish which according to Arora points to S. tomentosus.

Both have
By: Christian (Christian Schwarz)
2015-01-13 15:22:56 PST (-0800)

glandular dots on the stipe, and both can show bluing, but S. tomentosus is much more likely to show bright bluing reactions. The colors are paler yellow in S. tomentosus, and dingy orange in S. fuscotomentosus. The host pine is an easy way to tell them apart – 3 needle pines in the latter, 2-need (esp. lodgepole) for the former.

Thanks for the proposal Christian,
By: Terri Clements/Donna Fulton (pinonbistro)
2015-01-12 21:18:29 PST (-0800)

for some reason Suillus didn’t occur to me but I guess the pores are pretty Suillus like. From what I read S. fuscotomentosus doesn’t blue and S. tomentosus has glandular dots on the stipe. Admittedly this specimen was in pretty bad shape but I don’t believe there were any glandular dots. Are there exceptions to the rules for either?


Created: 2015-01-12 19:57:09 PST (-0800)
Last modified: 2015-01-13 20:37:40 PST (-0800)
Viewed: 44 times, last viewed: 2017-06-19 16:05:20 PDT (-0700)
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