Public Description of Gymnopus dryophilus (Bull.) Murrill

Title: Public Description (Default)
Name: Gymnopus dryophilus (Bull.) Murrill
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 Public Description (Default) [Edit]
 Draft For 2008/2009 Eol University Species Pages Initiative By Casey Whyte (Private)
 Draft For Wild Mushrooms Of The Northeastern United States By Erlon Bailey (Private)
 Draft For Macrofungi Of The Pacific Northwest By Chaelthomas (Private)

Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Omphalotaceae

General Description:

Gymnopus dryophilus is a small brown capped mushroom which is often considered to be a weed by many due to the fact that it is so common. It was formerly known as Collybia dryophila.

Diagnostic Description:

Cap: 1-7.5 cm, convex with an incurved margin when young, becoming broadly convex to flat; moist; smooth; dark reddish brown to brown when young, becoming tan to orangish brown to very pale.
Gills: Attached to the stem or free from it; whitish to pinkish, becoming buff; crowded.
Stem: 1-10 cm long; 2-7 mm thick; equal, occasionally slightly flared to base; dry; pliant and fibrous; smooth; whitish above, light buff below, becoming darker; soon hollow; usually with thin, whitish rhizomorphs attached to the base.
Spore Print: White to creamy or pale yellowish white.

Spores: 5-6.5 × 2.5-3.5 µ, smooth, elliptical, inamyloid.
Cheilocystidia 15-50 × 2-6 µ, clavate, subclavate, cylindric, or irregular; often with lobes or coralloid projections.
Hyphae:branched and swollen, interwoven hyphae 2-13 µ wide.


Widely distributed in North America.


Saprobic; growing alone, scattered, gregariously, or loosely clustered; growing from litter or twigs, in almost any hardwood, conifer, or mixed forest ecosystem

Look Alikes:

Many of the Gymnopus and Rhodocollybia species often look like Gymnopus dryophilus at first glance. Many times microscopic studies are required to determine what the species is.


Some studies have shown that certain chemicals formed by this fungus could be used as an anti-inflammatory agent although it is mostly just thought of as a weed.


Kuo, M. (2013, January). Gymnopus dryophilus. Retrieved from the MushroomExpert.Com Web site:


“Common Name: Common Gymnopus / Oak-loving Gymnopus”
Current Name:
Gymnopus dryophilus (Bull.) Murrill, N. Amer. Fl. (New York) 9(5): 362 (1916)

Agaricus dryophilus Bull., Herb. Fr. 10: tab. 434 (1790)
Collybia aquosa var. dryophila (Bull.) Krieglst., in Krieglsteiner, Ahnert, Endt, Enderle & Ostrow, Beitr. Kenntn. Pilze Mitteleur. 13: 36 (2000)
Collybia dryophila (Bull.) P. Kumm., Führ. Pilzk. (Zwickau): 115 (1871)
Collybia dryophila var. alvearis Cooke, Trans. Br. mycol. Soc. 3(2): 110 (1909) 1908
Collybia dryophila var. aurata Quél., Enchir. fung. (Paris): 31 (1886)
Collybia dryophila var. oedipoides Singer, Collnea bot., Barcinone Bot. Instit. 1: 233 (1947)
Marasmius dryophilus (Bull.) P. Karst., Bidr. Känn. Finl. Nat. Folk 48: 103 (1889)
Marasmius dryophilus var. alvearis (Cooke) Rea, Brit. basidiomyc. (Cambridge): 525 (1922)
Marasmius dryophilus var. auratus (Quél.) Rea, Brit. basidiomyc. (Cambridge): 524 (1922)
Omphalia dryophila (Bull.) Gray, Nat. Arr. Brit. Pl. (London) 1: 612 (1821)

Description authors: Tom Volk, Casey Whyte (Request Authorship Credit)
Description editors: Nathan Wilson, IntoTheFlames, walt sturgeon