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Crepidotus cinnabarinus

[ Basidiomycetes > Agaricales > Crepidotaceae > Crepidotus . . . ]

by Michael Kuo

You are looking at what happens when you get in a hurry. "Hey," I thought, "here are some cool looking, red, pleurotoid mushrooms. I'll just take some quick pictures, and shove them in my pocket." Nice effort, Michael. As a result I have the lousy photographs to the right and some poorly preserved, nearly useless dried specimens of a very beautiful and, it turns out, fairly rare species: Crepidotus cinnabarinus.

Like other species of Crepidotus, Crepidotus cinnabarinus features a brown spore print and a small, fan-shaped fruiting body--but unlike other species in the genus, it is brightly colored, making it fairly unmistakeable. It was originally described from Michigan, but its range has since been extended into Canada and southward into Mexico.


Ecology: Saprobic; growing alone, scattered, or gregariously on the dead wood of hardwoods (especially basswood and aspens); fairly rare; widely distributed east of the Great Plains, from southern Canada to Mexico.

Cap: 2-18 mm across; semicircular, shell-shaped, or fan-shaped; finely hairy to more or less smooth; bright red.

Gills: Close or nearly distant; yellow with red edges or red overall, becoming brownish with maturity.

Stem: Absent, but a pseudostem is occasionally present.

Flesh: Soft; thin; whitish to yellowish.

Odor and Taste: Odor not distinctive; taste mild.

Chemical Reactions: KOH on cap surface slowly dark red.

Spore Print: Brown.

Microscopic Features: Spores 6-10 x 4.5-7 µ; more or less elliptical; finely warted. Pleurocystidia absent. Cheilocystidia narrowly lageniform to narrowly utriform; up to about 80 x 15 µ; often somewhat flexuous. Pileipellis a trichoderm of cylindric, septate elements 4-10 µ wide. Clamp connections absent.

REFERENCES: Peck, 1895. (Saccardo, 1899; Kauffman, 1918; Hesler & Smith, 1965; Luther & Redhead, 1981; Bandala & Montoya, 2000; McNeil, 2006.) Herb. Kuo 09140801.

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


Crepidotus cinnabarinus

Crepidotus cinnabarinus

Crepidotus cinnabarinus

Crepidotus cinnabarinus

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Kuo, M. (2009, April). Crepidotus cinnabarinus. Retrieved from the MushroomExpert.Com Web site: