Cortinarius thiersii Ammirati & A.H. Sm.
Mycotaxon 5(2): 389. 1977.

Common Name: none

• Description

  For description see Ammirati & Smith & 'California Mushrooms'.

• Habitat

  Gregarious to cespitose in humus under conifers (fir & pine); relatively common, fruiting from spring through late summer above 1600 m elevation in the Sierra Nevada.

• Edibility

  Unknown.

• Comments

  Cortinarius thiersii can be distinquished by a yellowish brown to olive-brown cap with red KOH reaction, yellow young gills, and a pale greenish yellow to ochraceous stipe.

• References

  Ammirati, J.F. & Smith, A.H. (1977). Studies in the Genus Cortinarius III: Section Dermocybe, New North American Species. Mycotaxon 5(2): 381-397. (Protologue)
  Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
  Siegel, N. & Schwarz, C. (2024). Mushrooms of Cascadia: A Comprehensive Guide to the Fungi of the Pacific Northwest. Backcountry Press: Keeland, CA. 576 p.
  

• Other Descriptions and Photos
  Main Photo
  • Michael Wood: Cortinarius thiersii (CP)
  • Michael Wood: Cortinarius thiersii (CP)
  • Fred Stevens: Cortinarius thiersii (CP)
  • Fred Stevens: Cortinarius thiersii (CP)
  • Alan Rockefeller: Cortinarius thiersii (CP)
  • Warren Cardimona: Cortinarius thiersii (CP) — shows red KOH reaction
  • Damon Tighe: Cortinarius thiersii (CP) — shows red KOH reaction
  • Mushroom Observer: Cortinarius thiersii (CP)
  • Mushroom Hobby: Cortinarius thiersii (CP)
  
  

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