Mycena aurantiomarginata (Fries) Quélet
Mém. Soc. Emul. Montbél. II 5: 240. 1872.

Common Name: none

• Pileus

  Cap 1.0-2.0 (2.5) cm broad, obtuse-conic to bell-shaped, expanding to plano-convex, often with a low umbo, margin decurved; surface dry, translucent-striate to sulcate, sometimes with a faint whitish bloom when young; color: dark-brown to deep olive-brown at the disc, lighter towards the margin, the latter typically some shade of orange when young, fading to cream-buff at maturity, paler overall in age; context very thin, approximately 1.0 mm at the disc, whitish to watery-brown; odor not distinctive, taste mild.

• Lamellae

  Gills adnexed to notched with a descending tooth, close, thin, faces cream-yellow, edges apricot-orange; lamellulae up to 3-seried.

• Stipe

  Stipe 2.5-7.0 cm long, 1-2 mm thick, equal, slender, cartilaginous, stuffed to hollow at maturity; surface of apex glabrous to pruinose, yellowish, elsewhere glabrous, dull yellow-brown, olive-brown, the base with conspicuous yellow-brown to orange-brown hairs; partial veil absent.

• Spores

  Spores 7.5-9.0 x 4.0-5.5 µm, ellipsoid, amyloid; spore print white.

• Habitat

  Scattered to gregarious in conifer duff; fruiting from late fall to early winter.

• Edibility

  Unknown, insignificant.

• Comments

  This attractive Mycena is recognized when young by an orange-tinged, brownish cap. In age, the orange coloration which typically is concentrated near the margin fades, but it can still be distinguished by pale yellowish gills with apricot-orange margins, the latter the basis for the species name.

• References

  Perry, Brian A. (2002). A Taxonomic Investigation of Mycena in California. Masters Thesis, San Francisco State University: San Francisco, CA. 157 p.
  Mass Geesteranus, R. A. (1992). Mycenas of the Northern Hemisphere. II. Conspectus of the Mycenas of the Northern Hemisphere. Koninklijke Nederlandse Akademie van Vetenschappen: Amsterdam, Netherlands. 493 p.
  Robich, Giovanni (2003). Mycena D'Europa. Associazione Micologica Bresadola: Trento, Italy. 728 p.
  Smith, Alexander H. (1947). North American Species of Mycena. University of Michigan Press: Ann Arbor, MI. 521 p.

• Other Descriptions and Photos
  • Boleslaw Kuznik: Mycena aurantiomarginata (CP)
  • Boleslaw Kuznik: Mycena aurantiomarginata (CP)
  • Ron Pastorino: Mycena aurantiomarginata (CP)
  • Mycena Page: Mycena aurantiomarginata (CP)
  • Mushroom Observer: Mycena aurantiomarginata (CP)
  • Breitenbach & Kränzlin (vol. 3): sp. 320 (D, I, & CP)
  • Orr & Orr: p. 234 (D)
  • Smith (1975): sp. 11 (D & CP)
  
  

  (D=Description; I=Illustration; P=Photo; CP=Color Photo)