 The species was first described in 1822 as Boletus alboater by Lewis David de Schweinitz from specimens he collected in North Carolina . Elias Magnus Fries sanctioned this name in his 1821 Systema Mycologicum . The species was one of several Boletus species that Otto Kuntze transferred to Suillus in his 1898 Revisio Generum Plantarum . American mycologist William Alphonso Murrill transferred it to the genus Tylopilus in 1909 . In 1931 , French mycologist Jean @-@ Edouard Gilbert transferred the species to his newly created genus Porphyrellus , but this name has since been subsumed into Tylopilus . 
