Orange birch bolete or Slate bolete

The cap is large: 6-20 cm across, hemispherical with an inrolled margin in young mushrooms, becoming convex with age, then flat and spread out. The color is bright orange, brick-yellow, rusty orange, more intense in young mushrooms and paler in old ones. The cap skin is roughly suede-like or slightly fibrous, a little slippery in wet weather. The skin does not peel off; ragged scraps of a leathery "curtain" often hang from the margin.

The cap of the slate bolete reaches 5 to 15 centimeters across. When young it is hemispherical, becoming convex and cushion-shaped with age. The surface is smooth, dry or slightly slimy in rain, matte, often finely wrinkled in young mushrooms. The color is gray-brown, clay-brown or brownish-gray, sometimes with a faint violet tinge. The cap skin overhangs the margin slightly.

Tubular hymenophore. The tubes are long (2-3 cm), grayish-white in young mushrooms, grayish-cream with age. They are not attached to the stem (they separate easily from the cap). The spore print is olive-brown. The pores are small and round.

The hymenophore is tubular. The tubes are long, with small round pores, dirty white or grayish in young mushrooms, turning gray-brown with age. When pressed, the pores may slowly darken. The hymenophore separates easily from the cap flesh, as is typical of boletes. The spore print is olive-brown.

The stem is sturdy: 8-20 cm tall, 1.5-3 cm thick, cylindrical, thickened at the base and narrowing toward the top. Its color ranges from whitish to dirty gray, densely covered with dark gray or blackish scale-like fibers — a hallmark of the genus Leccinum. No ring.

The stem is tall, dense and firm, 6 to 15 centimeters tall, whitish or grayish-white, covered along its whole length with characteristic dark — gray-brown to black — scales that form a granular, net-like pattern. At the base, the cut stem flesh often takes on a bluish-greenish tint. There is no volva and no ring. The firm, dense stem sets this species apart from the softer Leccinum species.

The flesh is thick, white, very firm and meaty in young mushrooms. When cut, it gradually darkens: it may first turn pinkish, then violet-gray, then black, and the stem base often turns bluish — a normal reaction of the species, not a sign of spoilage. It also darkens when cooked. The texture holds its shape well in the pan.

The flesh is white, dense and firm, especially in young mushrooms, just as the name suggests. When cut it characteristically changes color: first turning pinkish or brownish, then gray and black; at the base of the stem it may turn green. The taste is mild and pleasant, with no bitterness. Thanks to its firm texture, the mushroom holds its shape well during cooking.

A faint, pleasant mushroomy smell with a hint of fresh forest litter. The taste is mild, delicate, typically mushroomy. No sharp or unpleasant notes.

The smell is faint, pleasant, typically mushroomy, with no sharp notes. The aroma is not a defining feature, so identification relies on the brown cap, the firm scaly stem, the color change of the cut flesh and the association with poplar or aspen.