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Hebeloma hiemale

[ Basidiomycetes > Agaricales > Strophariaceae > Hebeloma . . . ]

by Michael Kuo

As it is currently defined, Hebeloma hiemale is "a frequently collected species" occurring "with many hosts in a wide variety of habitats" from Europe to North America and New Zealand (Beker and collaborators, 2010). It is not, however, particularly easy to identify, and microscopic examination of spores and cheilocystidia (details below) is required in order to separate Hebeloma hiemale from several very similar species.


Ecology: Mycorrhizal with a wide range of hardwoods and conifers; growing alone, scattered, or gregariously; spring, summer, and fall (also over winter in warm conditions); probably widely distributed in North America.

Cap: 2-8 cm; convex, becoming broadly convex, broadly bell-shaped, or nearly flat; sticky when very fresh; bald; buff to tan--often with pinkish shades.

Gills: Attached to the stem, often by a notch; close or nearly distant; creamy when young, becoming cinnamon brown to brown; often with droplets of liquid when fresh.

Stem: 3-8 cm long; up to 1.5 cm thick; more or less equal; silky to finely scaly near the apex; whitish.

Flesh: Whitish to grayish.

Odor and Taste: Odor radishlike, or not distinctive. Taste radishlike, with a bitter component.

Chemical Reactions: KOH negative on cap surface.

Spore Print: Brown to pinkish brown.

Microscopic Features: Spores 10-13 x 5.5-7.5 µ; almond-shaped; finely verrucose; occasionally with a loosening perispore; weakly dextrinoid. Cheilocystidia 35-65 x 5-8 µ; abundant; clavate, subclavate, or cylindric above, with a somewhat constricted midportion and a ventricose (occasionally merely cylindric) basal portion; sometimes with somewhat thickened walls in the apex or in the constricted midportion. Pileipellis an ixocutis.

REFERENCES: Bresàdola, 1892. (Saccardo, 1902; Kauffman, 1916; Vesterholt, 2005; Beker et al., 2010.) Herb. Kuo 05070703, 09220807.


Hebeloma hiemale

Hebeloma hiemale

Hebeloma hiemale
Spores (KOH)

Hebeloma hiemale

Hebeloma hiemale

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Kuo, M. (2012, March). Hebeloma hiemale. Retrieved from the MushroomExpert.Com Web site: