Name in North American Boletes: Suillus americanus AND Suillus sibiricus
- Species 2: sibiricus
Common Name: “Chicken Fat Suillus”
- Common Name 2: “American Slippery Jack”
Tells: Very viscid yellow cap, often w/red markings, stains fingers brown when handled. Grows under white pine. Yellow pores slowly stain reddish brown.
Other Information: Yellow cap flesh stains purplish brown. Stem is often hollow. There are two California versions, riparius and megaporinus. Both of those are notable for their huge pores.
Edibility: Good, though many people like to remove the cap skin first, especially if they’re being eaten fresh rather than dried.
Science Notes: DNA testing has merged Suillus sibiricus into the better known Suillus americanus.
- NH4OH (Ammonia): Cap skin flashes pink before turning red and then darkening to black.
- KOH: Cap skin turns black.
- FeSO4 (Iron Salts): Cap flesh turns olive.