Gyroporaceae

Its most famous species is gyroporaceae castaneus. It has a brown cap, and is usually found with oak trees. It differs from the true boletes in that the spores are a pale straw color. The cap is from 3 - 10 cm in diameter and rusty brown in color, which becomes darker with age. The stem is a similar color, although it may be lighter at the apex. If the stem is cut vertically, it is usual to find several cavities of differing sizes inside. Both the cap and the stem have a tendency to crack or split in dry periods or with age. The pores are small and white; they become dirtier with age and are not attached to the stem. They darken slightly when pressed. The tubes are also whitish, and the spore print is pale yellow to straw. The flesh is firm and does not change color on cutting. The photograph on the right shows the chunkier form; a slender form also occurs.