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Cortinarius mucosus

[Basidiomycetes > Agaricales > Cortinariaceae > Cortinarius ... ]

by Michael Kuo

Despite its disgusting name, Cortinarius mucosus is an attractive (if slimy) species, characterized by its brownish orange cap, its Russula-like stature, its straight and slimy stem, and its preference for pines. Under the microscope it features a gelatinized pileipellis and large, flask-shaped spores.


Ecology: Mycorrhizal with pines (especially, but not exclusively, with 2- and 3-needled pines) and with other conifers; growing alone, scattered, or gregariously; late summer and fall; apparently widely distributed in North America.

Cap: 4-12 cm; convex, becoming broadly convex or nearly flat; slimy when fresh; bald; brownish orange, fading to orangish or yellowish with age.

Gills: Attached to the stem; close or nearly crowded; creamy at first, becoming cinnamon to rusty brown.

Stem: 4-10 cm long; up to about 2.5 cm thick; more or less equal; white; covered with a glutinous slime veil when fresh and young, but eventually more or less dry; often with rusty fibrils or a ring zone.

Flesh: Whitish.

Odor and Taste: Not distinctive.

Chemical Reactions: KOH blackish red on cap surface.

Spore Print: Rusty brown.

Microscopic Features: Spores 11-17 x 5-7.5 µ; amygdaliform; moderately to strongly verrucose. Pleuro- and cheilocystidia absent; marginal cells occasional. Pileipellis an ixocutis of clamped, ochraceous elements.

REFERENCES: (Bulliard, 1792) J. J. Kickx, 1867. (Saccardo, 1887; Kauffman, 1932; Smith, Smith & Weber, 1979; Moser, 1983; Weber & Smith, 1985; Arora, 1986; Hansen & Knudsen, 1992; Breitenbach & Kränzlin, 2000; McNeil, 2006.) Herb. Kuo 09110502.

This site contains no information about the edibility or toxicity of mushrooms.


Cortinarius mucosus

Cortinarius mucosus

Cortinarius mucosus

Cortinarius mucosus

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Kuo, M. (2011, December). Cortinarius mucosus. Retrieved from the MushroomExpert.Com Web site: