Name in North American Boletes: Suillus brunescens AND Suillus borealis
Common Name: Western Slippery Jack
Tells: Viscid, oft-streaked white cap ages to yellow-, lilac- or dark-brown. White stem yellows on top w/age. Cap & stem base bruise red-brown, resolving to brown.
Science Notes: DNA evidence has merged Suillus brunnescens with Suillus borealis.
Other Information: White cap flesh ages to yellow from the stem out, & DNS. Yellow-buff pores age toward yellow-brown, & DNS. Likes pines.
- NH4OH (Ammonia): Cap flesh turns pink.
- KOH: Cap flesh turns pink.
- FeSO4 (Iron Salts): No data.