Suede bolete or Bay bolete

Cap 4-12 cm across, hemispherical in young mushrooms, later becoming convex to flat. Color olive-green, yellow-green, ocher-green, brighter when young, paling with age. The surface is velvety and dryish, slightly sticky in damp weather; in old mushrooms it often cracks, with white cracks between the polygons of skin.

Cap 5-15 cm across, hemispherical with an inrolled margin when young, later becoming convex-flat. Color chestnut-brown, dark chestnut, honey-brown: the rich color of autumn chestnuts. Darker when young, paler with age. Surface smooth, slightly velvety when young, a little tacky in wet weather, dry and matte in dry weather. The cap skin doesn't peel.

The hymenophore is made of tubes attached to the stem. Color bright yellow when young, turning yellow-olive with age. The pores are small and angular, and turn blue when pressed — usually, though not always. Spore print olive-brown.

Tubular hymenophore: the tubes are attached to the stem or slightly notched. Color yellowish when young, turning yellow-olive with age. The pores bruise distinctly blue to blue-green when pressed, a characteristic feature of the species. Spore print olive-brown.

Stem 5-10 cm tall, 1-2 cm thick, cylindrical, often slightly narrowing toward the base. Color yellow-ocher with fine lengthwise reddish-brown scales forming a net — a characteristic feature of the species among the boletes. No ring.

Stem 5-10 cm tall, 1.5-3 cm thick, thick, meaty, cylindrical, often thickened toward the base. Color yellow-brown to yellow-ochre, reddish toward the base, with fine lengthwise brownish fibers (not a net like porcini's; this is the key difference). When cut, it bruises faintly blue.

The flesh is meaty, pale yellow, rusty in the lower part of the stem. When cut, it changes little: it may turn faintly blue or flush slightly reddish. The smell is faintly mushroomy, with a note of ripe apple. The taste is mild and pleasant.

Flesh firm, meaty, white to pale yellow. When cut, it bruises blue slowly and faintly (within 1-2 min, not very noticeably), then fades. Smell and taste pleasant and mushroomy, with a hint of fresh nuts.

Faint, pleasant and mushroomy, with a fruity (apple) note.

Pleasant, rich, mushroomy, with a hint of nuts and damp forest.