GenBank Accession #: NR_120119 (RefSeq ITS), JQ958318 (ITS). Contr. Monogr. North Amer. Sp. Suillus 1964 pg. 38. Cited in "Synonymy of Suillus imitatus, the imitator of two species within the S. caerulescens/ponderosus complex." Mycotaxon 122.1 (2013): 389-398.