Yellow swamp brittlegill or Ochre brittlegill

Cap 4-10 cm across, when young convex with an inrolled margin, with age becoming flattened with a slightly depressed center. The cap skin is matte, slightly slimy in wet weather, peels back about 1/3 of the way to the center. Color: ochre-yellow, mustard-yellow, grayish-yellow, deeper toward yellow-brown at the center, paler toward the margin. Mature caps fade to pale cream. In mature specimens the margin has fine radial grooves.

Cap 5-10 cm across, when young convex with an inrolled margin, with age becoming flattened with a slightly depressed center. The cap skin is smooth, slightly slimy in wet weather, dry and matte in dry weather, peels easily 2/3 of the way to the center. Color a rich lemon-yellow, ochre-yellow, darker in the center to yellow-brown, paler toward the margin. No grayish tinge, which sets it apart from R. ochroleuca. Mature caps have fine radial grooves at the margin.

Gilled hymenophore — the gills are attached or free from the stem, moderately crowded, thin, brittle. Color: whitish at first, cream to pale ochre with age. Spore print pale cream to pale ochre.

Gilled hymenophore — gills adnate or free from the stem, moderately crowded, thin, brittle. Color whitish at first, ochre-cream to yellowish with age. Spore print yellow-ochre.

Stem 4-7 cm tall, 1-2 cm thick, firm, cylindrical, hollow in old specimens. Color: white to grayish-white, with faint grayish spots in old specimens. Surface smooth with lengthwise wrinkles. No ring.

Stem 5-10 cm tall, 1-2 cm thick, firm, cylindrical, hollow in old specimens. Color white to cream, quickly turns gray to gray-black when damaged — a characteristic reaction. Surface smooth with lengthwise wrinkles. No ring.

Flesh firm, brittle, white to cream. Does not change color when cut, or slowly turns grayish. Smell faint, neutral, taste mild when young, often bitterish when mature (tongue test).

Flesh firm, brittle, white, quickly turns gray to gray-black when cut — a reaction typical of the species (especially in the stem). Smell faint, pleasant, fruity, taste mild, sweetish, not bitter (tongue test).

Faint and neutral, with nothing distinctive.

Faint, pleasant, fruity, neutral-sweetish.