Summary:
Features include 1) a bald, glutinous to viscid cap that is yellow to ochraceous and has a margin with narrow band of sterile tissue at first, 2) flesh that is white except for yellow in the top of the stem and sometimes brown in stem base, 3) large yellow unchanging pores, 4) a whitish to yellow stem that develops pinkish brown dots but does not have a veil or an annulus, and 5) growth under pines. Nguyen(3) provide molecular evidence that the type of S. flavogranulatus is Suillus lakei, which is surprising because the descriptions are so different.

Chemical Reactions:
flesh stains pinkish then dull lilac with application of KOH and olive with FeSO4, (Bessette)

Odor:
somewhat unpleasant (Bessette, Smith)

Taste:
not distinctive (Bessette), mild (Smith)

Microscopic:
spores 7.5-9 x 3-3.5 microns, oblong, smooth, pale yellow, (Bessette), spores 7.5-9 x 3-3.2 microns, oblong, smooth, somewhat dextrinoid, yellowish to nearly colorless in KOH; basidia "4-spored in some areas, many with vinaceous to vinaceous-brown content (as revived in KOH)"; pleurocystidia clustered, 40-56 x 7-10 microns individually, "clavate to subfusoid or subcylindric, content lilaceous when first revived in KOH, but soon dull vinaceous-red to vinaceous-brown, pigment diffused throughout the cell and in amorphous masses around the bundle"; cap cuticle an outer gelatinous trichodermium of hyphae 3-8(10) microns wide "with much granular material around and along the granular sheath"; caulocystidia in clusters and similar to pleurocystidia in size, shape and color in KOH; clamp connections none, (Smith)

Spore Deposit:
pale rusty cinnamon, (Bessette), "pale rusty cinnamon after escape of moisture", (Smith)

Notes:
Suillus flavogranulatus is found in BC, ID, and WA, (Bessette).

EDIBILITY

unknown (Bessette)

Synonyms and Alternate Names:
Merulius tremellosus Schrad.