Scientific name: Tricholomopsis decora (Fr.) Singer
Derivation of name: Decor- means "beautiful or elegant.
Synonyms: Tricholoma decorum (Fr.) Quel.
Common name(s): Decorated mop.
Occurrence on wood substrate: Saprobic; Solitary or in
small groups on decaying conifer wood; June through
Dimensions: Caps 2.5-6 cm wide; stipes 3-6 cm long and
0.3-1 cm thick.
Cap: Yellowish surface covered by gray to gray-brown to
blackish, fibrous scales; darker in center.
Gills: Attached; yellow.
Spore print: White.
Stipe: Yellow; dotted with tiny black scales.
Edibility: Inedible, perhaps poisonous.
Comments: An article (page 28) in the Spring, 2006 issue
of Mushroom, the Journal implicates Tricholomopsis decora
in a life-threatening mushroom poisoning event. At his website
below, Michael Kuo
discusses T. decora as a likely member
of a species cluster.
More information at MushroomExpert.com:
Figure 1. Yellow cap, stalk, and gills with just a hint of the
dark fibers covering the cap surface. Photo © Larry Grand.
Tricholomopsis decora. Photo © John
Figure 3. When young, the yellow surface is not readily
beneath the dark, fibrous sclaes. Photo © William
Note how the expansion of the cap separates the
dark fibers, revealing the underlying yellow flesh.
Photo © Larry Grand.
Figure 5. The dark fibrous scales are readily seen against the
yellow background color of Tricholomopsis decora.
Photo © Gary Emberger.
Figure 6. A display of Tricholomopsis decora at the
NAMA meetings in Canada in 2003. Photo © Gary