Observation 149419: Suillus granulatus (L.) Roussel
When: 2013-10-20
No herbarium specimen

Notes: I found these under two mature white pines growing next to my residence. Gregarious growth at its best! Mushrooming is now so poor everywhere else in NJ that this bonanza is out of place. I wish other finer edibles could occasionally do the same thing. While I am curious about how they taste, I am not looking forward to peeling the sticky cuticle. :)

Note the pale lemon yellow stipes in specimens of all ages — some with glandular smears and some without — and the cloudy whitish liquid oozing from the pores. In the past this form of S. granulatus used to be called S. lactifluus.

M. Kuo of MushroomExpert.com, who stresses the importance of ecology as a factor in establishing specificity in mycorrhizal relationships, that “In fact, specimens of Suillus granulatus collected under different [tree] hosts were revealed to be genetically distinct!”.

Proposed Names

28% (1)
Recognized by sight
Based on chemical features: NH4OH = pale gray on cap, pinkish orange on pores, pink on flesh; KOH = deep olive green on cap, reddish-pink on pores, pink to purple on flesh
57% (1)
Eye3 Eyes3
Recognized by sight: In the past this mushroom would have been called S. lactifluus (With.) A.H. Sm. & Thiers

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Taxonomy/nomenclature clarification
By: I. G. Safonov (IGSafonov)
2016-12-21 18:37:54 EST (-0500)

In light of the recent Suillus publication in Mycologia by Nguyen et al., the S. granulatus/ S. lactifluus situation needs to be clarified for one last time.
Basically, according to the above reference, what we’ve been calling S. granulatus (L.) Roussel (the one with white stipes) growing under soft pines, e.g. P. strobus, in North America is a misnomer. It’s actually S. weaverae (A.H. Sm. & Shaffer) Kretzer & T.D. Bruns, based on DNA sequencing data. At the same time, the old good S. granulatus (L.) Roussel is a strictly Europena taxon. nrITS sequences of NA S. lactifluus (With.) A.H. Sm. & Thiers are deeply nested within the European S. granulatus “clade”, making the former one a synonym.
The bottom line, therefore, is that the mushroom in this obsie that we had good reasons to call S. lactifluus is actually S. granulatus (L.) Roussel, not the American lookalike now called S. weaverae.

Taxonomy is a mess
By: GPC™ (Gil Costa)
2014-11-15 11:45:19 EST (-0500)

Suillus lactifluus is a synonym; the name was formerly applied to a form of Suillus granulatus with a stem that is more yellow in youth, glandular dots that do not darken as much, and a young pore surface frequently beaded with milky droplets; see the illustration to the right.”

in:
http://www.mushroomexpert.com/suillus_granulatus.html

I need reliable fonts! Where can I get ‘official’, reliable fonts?
kind regards
Gil

GPC™,
By: I. G. Safonov (IGSafonov)
2014-11-14 02:44:31 EST (-0500)

This variety of the weeping bolete is not the textbook case of the North American S. granulatus with a white stipe. In Bessettes’ guide S. lactifluus is listed as a separate species, granted that book’s been published over a decade ago.

Host Tree
By: I. G. Safonov (IGSafonov)
2014-11-14 02:28:32 EST (-0500)

Yes, Walter, this large bundle was collected under two mature white pines growing in company of a pair of sweet gums, not that the latter ones would matter. :) The pines produced a much smaller crop this year about the same time.

Host tree
By: walt sturgeon (Mycowalt)
2014-11-13 19:21:35 EST (-0500)

White pine and????

Easier and proper name (if you digg some latin!)
By: GPC™ (Gil Costa)
2014-11-13 16:43:23 EST (-0500)

Suillus lactifluus is a much more adequate name, I think!
(Only when I knew this synonym I was sure about the ID because is so much more descriptive)

Created: 2013-10-20 21:45:52 EDT (-0400)
Last modified: 2016-12-21 19:02:42 EST (-0500)
Viewed: 86 times, last viewed: 2016-12-29 20:22:54 EST (-0500)
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