Scientific name: Psathyrella rugocephala (Atkinson) Smith
Derivation of name: Rug- means "wrinkle" and cephal-
means "head." Rugocephala aptly describes
the cap of this
Common name(s): Corrugated-cap Psathyrella.
Occurrence on wood substrate: Saprobic;
scattered or in
groups on and around decaying
deciduous wood; July through
Dimensions: Caps 5-10 cm wide; stipes 7.5-12.5
cm long and
0.5-1 cm thick.
Cap: Brownish to rusty brown, fading to tannish;
coarsely radially wrinkled.
Gills: Attached; whitish, becoming purplish-brown to
Spore print: Purple-brown.
Stipe: Whitish, darkening to brownish below.
Veil: Fibrillose-membranous, not leaving a ring.
Edibility: Edible but not recommended due to
Comments: Macroscopically, Psathyrella
delineata is nearly
identical to Psathyrella rugocephala. The two species
only be reliably separated on spore size and morphology.
More information at MushroomExpert.com:
Figure 1. The browish, wrinkled cap is an important first
step in identifying Psathyrella rugocephala. Photo ©
John Plischke III.
Figure 2. Psathyrella delineata strongly resembles
rugocephala. Reliable separation of the two species
requires examination of spore size and morphology.
© William Roody.