Czech Mycol. 60(1): 25. 2008.
Common Name: none
Synonyms: Marasmius quercophilus Pouzar; Setulipes quercophilus (Pouzar) Antonin
Cap 2-5 mm broad, convex, broadly so to plane in age, occasionally with the disc depressed; margin decurved, sometimes becoming plane, often sulcate; surface minutely pruinose (use hand lens), striate wrinkled to two-thirds the distance from the margin to the disc; color light-brown at the disc, pallid to cream-buff at the margin; context very thin, pallid; odor mild, taste: untried.
Gills adnexed, subdistant, moderately broad, whitish, lamellulae 1-2 seried.
Stipe 1-2.5 cm long, less than 1 mm thick, round, hair-like, equal, sometimes flexuous; surface at apex pallid to pale vinaceous-brown, sparsely pruinose, elsewhere glabrous, reddish-brown to dark-brown, instititious on leafy substrate, scattered rhizomorphs near base.
Spores 7.5-9.0 x 3-4.5 µm, ellipsoid to almond-shaped, smooth, nonamyloid, hyaline in KOH; spore print not seen.
Solitary to gregarious on rotting hardwood leaves, notably species of oak (Quercus) and tanbark oak, (Lithocarpus densiflora); fruiting shortly after the fall rains.
Unknown; too small to have culinary value.
Gymnopus quercophilus fruits on oak and tanbark leaves. Often up to a dozen fruiting bodies of this Lilliputan species may occupy the same leaf. It's distinguishing macroscopic characters are a pale, striate-wrinkled, minutely pruinose cap with a brownish disc, distant gills, a mostly dark-brown polished, hair-like stipe, and a lack of distinctive odor. Like many Marasmius-like species, it is capable of rehydrating to its original size and shape after drying.
Antonín, V. & Noordeloos, M.E. (2010). A monograph of marasmioid and collybioid fungi in Europe. IHW-Verlag: Eching, Germany. 480 p.
Desjardin, Dennis E. (1987). The Agaricales (Gilled Fungi) of California. 7. Tricholomataceae I. Marasmioid Fungi. Mad River Press: Eureka, CA. 100 p.
Desjardin, Dennis E. (1987). New and Noteworthy Marasmioid Fungi from California. Mycologia 79: 123-134.
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
Noordeloos, M.E. & Antonín, V. (2008). Contribution to a monograph of marasmioid and collybioid fungi in Europe. Czech Mycol. 60(1): 21-27.
Pouzar, Z. (1982). Marasmius quercophilus, a new species, common on oak leaves. Česká Mykologie 36(1): 1-6.