 However, as was pointed out nearly a century later in 1986, the 1869 report does not actually mention the species; rather, Peck's field notes that year (which served as the basis for the report) reference a collection at Sand Lake upon which the original (1888) description was most likely based.Because Peck failed to designate a type specimen, one of the Sand Lake specimens was lectotypified in 1986.In 1931, French mycologist Édouard-Jean Gilbert transferred the species to the genus "Ixocomus", a now-defunct taxon that has since been subsumed into "Suillus".