Pine bolete or Bronze bolete

Cap 8–20 cm (sometimes up to 30), hemispherical with a whitish margin in young mushrooms, later flattening to cushion-shaped. Color wine-red, dark chestnut-red, darker at the center and reddish toward the edges. The skin is matte, slightly sticky in wet weather and finely fibrous in dry weather. Whitish patches — a bloom of mycelium — are sometimes visible.

Cap 5–20 cm, hemispherical in young mushrooms, then cushion-shaped. Color dark — from bronze-olive to chocolate brown, sometimes almost blackish brown. Surface matte, slightly fibrous or finely cracked in dry weather. In old mushrooms it may fade noticeably.

Pore surface of tubes, free or notched near the stem. White when young, then yellowish, olive-green in mature mushrooms. Pores small and round. Does NOT turn blue when pressed — a key feature of all four porcini.

Hymenophore tubular, free or slightly notched at the stem. White at first, then yellowish, olive-yellow in mature mushrooms. Pores small and round. Key feature: it does NOT turn blue when pressed or cut — this sets it apart from many potentially dangerous boletes.

Stem 8–15 cm tall, 3–7 cm thick, bulbous or club-shaped, hefty. Color brownish red-brown, darker than the cap in the lower part. Along its whole length runs a characteristic net of fine reddish ridges (as in the summer bolete B. reticulatus, but in the pine bolete the net is redder).

Stem 5–13 cm tall, 2–4 cm thick, bulbous or club-shaped, cylindrical in old mushrooms. Color chestnut brown, darker than the cap. Along its whole length runs a fine brown net, close to the stem in colour and usually more distinct near the top. This is a hallmark feature of porcini.

Flesh white, very dense and heavy, does NOT change color when cut. Wine-red patches are sometimes visible under the cap skin. The texture is dry, with a pleasant resistance when cut. It is less often maggoty than the classic porcini.

Flesh white, very firm, does NOT change color when cut. This is an important diagnostic feature — in lookalikes (for example, the bitter bolete) the flesh turns pinkish. The texture is like a nicely mature porcini: fibrous, with a pleasant resistance when you slice it.

The smell is richly mushroomy, with nutty and resinous notes. Dried, it keeps its aroma better than any other porcini species. The taste is mild, sweetish, not bitter.

Smell richly mushroomy, with nutty notes, in some specimens stronger than in ordinary porcini. Taste mild, sweetish, with no bitterness.