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Mycena epipterygia var. lignicola

[ Basidiomycetes > Agaricales > Tricholomataceae > Mycena . . . ]

by Michael Kuo

Apparently widely distributed in North America, Mycena epipterygia var. lignicola is one of the more easily recognized mushrooms in Mycena. It has a sticky, yellow-green to greenish yellow cap, and it grows gregariously from the well decayed deadwood of conifers. Only Mycena epipterygia var. epipterygia looks similar; it differs in its colors, which are usually less green, ranging from dull yellow to brownish yellow--and in its scattered to gregarious, terrestrial habitat.


Ecology: Saprobic on the barkless, often mossy, well decayed deadwood of conifers; growing gregariously; fall; apparently fairly widely distributed in North America.

Cap: Up to about 1.5 cm across; egg-shaped, becoming broadly conic to broadly bell-shaped; sticky when fresh; bald; yellow-green to bright greenish yellow, fading to dull yellow; the margin sometimes faintly lined; cuticle fairly tough and elastic, peel-able.

Gills: Attached to the stem by a tooth; close or nearly distant; whitish to pale greenish yellow or yellow.

Stem: 4-6 cm long; 1-1.5 mm thick; fragile; equal; bald; sticky; colored like the cap or paler.

Flesh: Insubstantial; yellowish.

Odor and Taste: Odor slightly to moderately mealy or slightly of iodine; taste similar.

Spore Print: White.

Chemical Reactions: KOH negative on cap surface.

Microscopic Features: Spores 7-13 x 5-8 µ; weakly to moderately amyloid; elliptical; smooth. Basidia usually 2-spored. Cheilocystidia abundant; clavate to subglobose or occasionally saccate; covered with numerous rod-like projections. Pleurocystidia absent. Pileipellis an ixocutis.

REFERENCES: Smith, 1947. (Smith, 1947; Miller, 1981.) Herb. Kuo 10091004.

The Index Fungorum lists var. lignicola as a synonym of the typical variety. But it also mis-cites the original publication of var. lignicola and (this is a serious recurring problem with the Index) provides no authority for the synonymizing. I'll bet my hat the "authority" is a European who has never seen the North American mushroom in question; this happens a lot in Mycena.

Further Online Information:

Mycena epipterygia var. lignicola in Smith, 1947


Mycena epipterygia var. lignicola

Mycena epipterygia var. lignicola

Mycena epipterygia var. lignicola

Mycena epipterygia var. lignicola

Mycena epipterygia var. lignicola

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Kuo, M. (2010, December). Mycena epipterygia var. lignicola. Retrieved from the MushroomExpert.Com Web site: