Tricholoma fracticum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Tricholomataceae
Genus: Tricholoma
Species:
T. fracticum
Binomial name
Tricholoma fracticum
Synonyms[1]
  • Agaricus fracticus Britzelm. (1893)
  • Agaricus cuneiforme Britzelm. (1893) [1]
  • Armillaria fractica (Britzelm.) Sacc. (1895)
  • Tricholoma cuneiforme Britzelm. (1895) [1]
Tricholoma fracticum
View the Mycomorphbox template that generates the following list
Gills on hymenium
Cap is convex
Hymenium is subdecurrent
Stipe has a ring
Spore print is white
Ecology is mycorrhizal
Edibility is inedible

Tricholoma fracticum is a sturdy mushroom of the agaric genus Tricholoma with a red-brown cap and a harshly bitter taste.[2] It is mycorrhizal with conifers, primarily of the genus Pinus,[2] and can be found in California.

Taxonomy

First described as Agaricus fracticus by German mycologist Max Britzelmayr in 1893,[3] it was transferred to the genus Tricholoma in 1984 by Hanns Kreisel.[4] Though it has been occasionally listed as a synonym of Tricholoma batschii, a European species, T. fracticum possesses larger spores and 2-spored basidia in contrast with T. batschii's 4-spored basidia,[5] and they are currently considered separate species.[1]

Description

Tricholoma fracticum is distinguishable with relative ease by noting the combination of a red-brown cap that becomes viscid (slimy) when wet, and a quickly disappearing partial veil that leaves a flimsy ring or sometimes only a delineation in stipe color up towards the gills. No other Tricholoma in California has both of these features.[5] Also worth noting is its sharp, bitter taste, which is always present in this species and distinguishes it from lookalikes such as Tricholoma aurantium, which has a blander, mealy taste. The cap is more or less smooth, with an initially inrolled margin, 3-10cm in diameter, broadly convex and flattening slightly in maturity. Gills are whitish, attached, and notched to subdecurrent. Stem sturdy, 2-8cm long, 1-2.5cm thick, whitish near apex, orange-brown below, with a flimsy but usually present ring. Flesh white, not bruising or changing upon exposure. Odor indistinct. Spore print white.[2]

See also

References

  1. 1 2 3 4 "Tricholoma fracticum (Britzelm.) Kreisel :700, 1984". MycoBank. International Mycological Association. Retrieved 2013-03-23.
  2. 1 2 3 Kuo, Michael (2006). "Tricholoma fracticum". MushroomExpert. Retrieved January 19, 2022.
  3. ↑ Britzelmayr M. (1893). "Materialien zur Beschreibung der Hymenomyceten 1". Botanisches Centralblatt (in German). 54 (2): 33–40.
  4. ↑ Kreisel H. (1984). "Beitrag zur Nomenklatur einiger Großpilze II". Feddes Repertorium Specierum Novarum Regni Vegetabilis (in German). 95 (9–10): 699–800. doi:10.1002/fedr.4910950919.
  5. 1 2 Shanks, Kristen (1994). "A Systematic Study of Tricholoma in California" (PDF). Retrieved January 19, 2022. {{cite journal}}: Cite journal requires |journal= (help)


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