Albatrellus flettii, commonly known as the blue-capped polypore,[1] is a species of fungus in the family Albatrellaceae. It was originally described in 1941 by Elizabeth Eaton Morse as Polyporus flettii, but this naming was invalid as it lacked a Latin description. Zdeněk Pouzar transferred it to Albatrellus in 1972. The species is found in western North America, where it grows on the ground in coniferous forests.