Beck (1923) Gyroporus castaneus, or commonly the chestnut bolete, is a small, white-pored mushroom in the Gyroporaceae of order Boletales.

The cap is from 3 to 10 cm in diameter, and pale to rusty brown in colour, which becomes darker with age.

If the stem is cut vertically, it is usual to find several cavities of differing sizes inside.

[5][6][7] Gyroporus castaneus is edible, and highly regarded by most authors;[8] it is said to taste pleasantly nutty when young.

[citation needed] However, Marcel Bon, in his 1987 book The Mushrooms and Toadstools of Britain and North Western Europe, records it as suspect,[9] so it may be worth applying caution, by eating a very small amount initially.