Summary:
There is not yet clear evidence that either European Suillus granulatus or eastern North American Suillus ''granulatus'' (which needs a new name) occurs in the Pacific Northwest, although identifications have been made (see Range). Features of North American Suillus ''granulatus'' include 1) viscid to glutinous cap that is whitish, tan, brown, cinnamon, or orange-cinnamon, 2) whitish to yellowish pores that stain dull cinnamon, 3) whitish to pale yellow flesh that does not turn blue, 4) whitish to yellowish stem with conspicuous pinkish tan to brown dots, 5) absent veil, and 6) growth under pine. North American Suillus ''granulatus'' (which associates with soft pines) is not genetically close to European Suillus granulatus (which associates with hard pines) in the work of Nguyen(3). The latter paper proposed in 2006 the use of the name Suillus weaverae for North American Suillus ''granulatus''. However the situation does not appear completely resolved because 1) the Suillus weaverae clade is nested within the Suillus placidus/subalpinus/anomalus complex in Nguyen(3), and 2) The online Species Fungorum, accessed February 24, 2018, gives the current name of Suillus weaverae as Fuscoboletus weaverae. The three other Fuscoboletinus species in the online Species Fungorum, F. spectabilis, F. glandulosus, and F. grisellus, are located in two other parts of the Nguyen(3) tree - note that MycoBank (accessed the same day) gives the Suillus names of these three as obligate synonyms and does not designate a current name. Incidentally, both the online Index Fungorum and MycoBank on that day gave two competing 1996 authorities for Suillus weaverae. Cloudy droplets often cling to the pores of Suillus ''granulatus'', giving it the name "milk bolete", (Schalkwijk-Barendsen).

Chemical Reactions:
cap cuticle stains dark olive to olive-gray with application of KOH and bluish gray with FeSO4, flesh stains pink then pinkish brown with KOH and olive gray with application of FeSO4; stem surface purplish brown with application of KOH and dark green with FeSO4; pore surface instantly rusty orange then rapidly purplish brown with application of KOH, olive green with FeSO4, (Bessette)

Odor:
not distinctive (Bessette), mild to slightly fragrant (Smith(34)), pleasant, slightly acid, fruity, (Lincoff(1))

Taste:
not distinctive (Bessette), mild to acid (cap cuticle) (Smith(34))

Microscopic:
spores 7-10 x 2.5-3.5 microns, oblong or tapered slightly to apex, pale brown, (Bessette), spores 7-9(10) x 2.5-3.5 microns, oblong or tapered slightly to the apex, smooth, yellowish in Melzer''s reagent and KOH; basidia 4-spored, 18-24 x 5-6 microns, clavate, colorless in KOH; pleurocystidia "in bundles with brown incrusted material around base", individually 36-50 x 7-9 microns, clavate to subcylindric, colorless or with yellowish to brown content, cheilocystidia similar; cap epicutis a gelatinous trichodermium of hyphae 4-7 microns wide, "in KOH the content dingy ochraceous to bister, some encrusting material present in the layer"; caulocystidia "40-70 x 7-10 microns, clavate, subfusoid or cylindric, mostly with colored content, bases of clusters surrounded by brown pigment", content of cystidia colorless to colored and mostly coagulated, "incrusting pigment present over much of caulohymenium"; clamp connections absent, (Smith(34))

Spore Deposit:
brown (Bessette), dingy cinnamon to cinnamon (Smith(34)), brown to dull cinnamon or ocher (Arora), dingy cinnamon to red-brown (Miller)

Notes:
S. ''granulatus'' is found in eastern Canada south to SC, west to CA and the Pacific Northwest, (Bessette). It was collected from ID (Smith(36) who discuss the similarity to Suillus punctatipes about which they comment "It is, to all practical purposes, a S. granulatus with a boletinoid configuration of the tube mouths." [Latin name italicized]). For the Smith(36) study they studied 3 collections of S. punctatipes and 10 collections of S. granulatus. It has also been recorded from WA and OR, (vouchered at University of Washington), MI (Smith(35)), NS, and NC, (Lincoff(2)). It has been reported from BC (in Redhead).

EDIBILITY

edible, but note that a few people develop contact dermatitis with swelling and itchy rash on handling this species, (Bessette), occasionally gastric upset has resulted (Miller)