Charbonnier or Soapy knight

Cap 5-12 cm across, when young convex with an inrolled margin, becoming with age flattened-expanded with a small bump. The skin is smooth, slightly slimy in wet weather, dry and matte in dry weather. Color: very variable — gray-white, olive-gray, greenish-gray, brownish-gray, in some forms almost black in the center. Old fruiting bodies have small cracks.

Cap 5-12 cm across, when young bell-shaped or convex-conical, becoming with age flat-convex with a low, broad bump in the center. The skin is smooth, slightly slimy in wet weather, dry and matte in dry weather. Color: gray-violet, gray-greenish, olive-gray, darker in the center, with distinct fine dark radial fibrous streaks — a diagnostic feature. The margin is even, slightly wavy in old caps, inrolled in young ones.

Gilled hymenophore — the gills are notched (sinuate) where they attach to the stem, moderately crowded, fleshy. When young they are whitish, becoming with age creamy-grayish, often turning pink when damaged. Spore print white.

Gilled hymenophore — the gills are notched (sinuate) where they attach to the stem, moderately crowded, fleshy. When young they are whitish with a faint yellowish tinge, becoming with age creamy-yellowish, especially toward the edge. The yellowish tone of the gills is a diagnostic feature. Spore print white.

Stem 5-10 cm tall, 1-2.5 cm thick, firm, cylindrical, thickening toward the base when young. Color: whitish to grayish; pinkish-red spots often appear when damaged — a diagnostic feature. Surface smooth with lengthwise fibers. No ring.

Stem 5-10 cm tall, 1.5-2.5 cm thick, firm, fleshy, cylindrical. Color: whitish with a characteristic yellowish tinge, especially toward the base. Surface smooth with fine lengthwise fibers. No ring.

Flesh firm, white, develops pinkish-red spots when cut or pressed, especially in the lower part of the stem — a characteristic reaction and an important diagnostic. Smell distinctly soapy (laundry soap), taste soapy-bitterish, unpleasant.

Flesh firm, white in the cap, white with a yellowish tinge in the stem. Does not change color when cut — it does not turn pink (unlike T. saponaceum) and does not darken. Smell distinctly mealy-cucumber, taste mild, pleasantly mushroomy with a hint of flour, no bitterness.

Distinctly soapy — reminiscent of laundry or toilet soap. A diagnostic feature, especially clear when cut and in mature fruiting bodies.

A distinct, pleasant mealy-cucumber smell — like freshly ground flour with a note of fresh cucumbers. A diagnostic feature, clear when you cut it.