Albatrellus flettii, commonly known as the blue-capped polypore,[4] is a species of fungus in the family Albatrellaceae.

It was originally described in 1941 by Elizabeth Eaton Morse as Polyporus flettii,[5] but this naming was invalid as it lacked a Latin description.

The bluish to tan caps are 5–15 centimetres (2–6 in) wide and often include a pattern small cracks revealing the light flesh.

[6] Similar species include the typically smaller Neoalbatrellus caeruleoporus and N. subcaeruleoporus, as well as Osteina obducta and members of Polyozellus.

[6] The species is found in western North America, where it grows on the ground in coniferous forests.