Suillus spectabilis or Slippery jack

Cap 5–12 cm, hemispherical in young mushrooms, then cushion-shaped. Color reddish brown, dark raspberry, with a characteristic "fibrous" surface pattern — as if made of fine fabric. The surface is sticky in wet weather, matte in dry. Mature ones often have a thicker, darker center.

Cap 4–12 cm across, convex in young mushrooms, later flattened-convex. The surface is covered with a thick layer of slime — especially in wet weather. Color chocolate-brown or chestnut, yellowish brown when dry. The margin often bears remnants of the partial veil.

Hymenophore tubular, running down the stem (a characteristic feature of the genus Boletinus). Color yellowish, olive-brown in mature ones. Pores large, angular, sometimes arranged radially.

The hymenophore has tubes. Pores yellow, small, regular, turning yellow-green with age. The tubes are attached to the stem or run slightly down it. When pressed, the pores turn slightly brownish.

Stem 4–10 cm tall, 1–2.5 cm thick, cylindrical. Color reddish brown to dark brown, darker than the cap. In the upper part, a characteristic coarse net of thick veins. Ring membranous, white with pinkish tones, quickly disappearing.

Stem 5–10 cm tall, 1–2 cm thick, solid, cylindrical. Yellow and granular in the upper part, brown or violet-brownish below the ring. A characteristic purple-brown membranous ring — a remnant of the partial veil and one of the key diagnostic features of the species.

Flesh yellowish, soft, watery. When cut it slowly turns red, then darkens to brown. Firmer and fibrous in the stem.

Flesh yellowish or pale cream, firm in young mushrooms, softer in mature ones. Turns slightly pink when cut or stays unchanged. The taste is mild, pleasant, slightly sourish. The cap skin peels off easily together with the slime.

Smell faint, pleasantly mushroomy with a slightly resinous note (from the larch). Taste mild, not bitter.

Smell pleasant, unobtrusively mushroomy, slightly resinous — reflecting its symbiosis with pine. With cooking the aroma intensifies and becomes more pronounced. No foreign unpleasant notes.