Synonymy:
Boletus firmus Frost, Bull. Buffalo Soc. nat. Sci. 2: 103 (1874) [1874-1875]
Suillus firmus (Frost) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 535 (1898)

Position in classification:
Caloboletus, Boletaceae, Boletales, Agaricomycetidae, Agaricomycetes, Basidiomycota, Fungi

Note:
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