Wrinkled Psathyrella

(Typhrasa gossypina)

Conservation Status
Wrinkled Psathyrella
Photo by Honey Fae (Farah)
  IUCN Red List

not listed


not listed


not listed


Wrinkled Psathyrella is a medium-sized gilled mushroom. It occurs in western Europe and eastern United States. It is uncommon in Minnesota, where it reaches the western extent of its range. From July through September, it appears alone, scattered, close together but not in clusters (gregarious), or in clusters, in forests and woodlands. It grows on dead and already decayed hardwood, on mulch, and on woody debris. It obtains its nutrients from dead wood (saprobic).

When it first appears, the cap is cone-shaped to bell-shaped, dark brown to dark reddish-brown, and lined (striate) on the margin. When wet it is opaque, but as it dries out the drier tissue becomes light yellowish-brown and unevenly transparent. When the edge of the cap dries the gills on the underside show through. The upper surface is sometimes covered with white hair-like fibers (fibrillose). There are often white tissue fragments, remnants of the partial veil, hanging from the margins. As it ages it first becomes convex then flattens out, sometimes retaining a broad raised knob in the middle (umbonate), and fades to brownish or tan. The mature cap is 1¼ to 4 (3 to 10 cm) in diameter. The upper surface is coarsely, radially wrinkled.

The gills are pale brown at first, becoming dark brown with age. They are broadly attached to the stalk (adnate) and medium-spaced apart. The edges become minutely fringed and sometimes whitish with age.

The stalk is 2 to 4 (6 to 10 cm) long 316 to (5 to 15 mm) thick. It is hollow and whitish when young, becoming brownish below. The upper part is covered with white powdery particles (pruinose), and the base is usually covered with long, white, thread-like fibers (mycelium). There is no true ring of tissue but there are sometimes remnants of the partial veil loosely clinging to the stalk.

The flesh is pale brown, thin, fragile, and watery. It is edible but the taste is not distinctive. Eating is not recommended due to the difficulty in accurately identifying this species.

The spore print is purplish-brown to purplish-black.


Similar Species

Habitat and Hosts

Forests and woodlands

Decaying hardwood, mulch, and woody debris




July through September


Distribution Map



4, 24, 26, 29, 30.





  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Phylum Basidiomycota (club fungi)  
  Subphylum Agaricomycotina (jelly fungi, yeasts, and mushrooms)  
  Class Agaricomycetes (mushrooms, bracket fungi, puffballs, and allies)  
  Subclass Agaricomycetidae  
  Order Agaricales (common gilled mushrooms and allies)  
  Suborder Agaricineae  
  Family Psathyrellaceae  



This species was formerly classified as Psathyrella delineata. A recent phylogenetic analysis (Örstadius, et al., 2015) determined that Psathyrella delineata and Psathyrella canadensis were the same. Both were transferred to the new genus Typhrasa and became the single species Typhrasa gossypina.




Agaricus gossypinus

Drosophila delineata

Hypholoma delineatum

Psathyrella delineata

Psathyrella gossypina

Typhrasa delineata


Common Names


Artist Crumblecap

Wrinkled-cap Psathyrella

Wrinkled Psathyrella












On mushrooms, covered with fine hair-like fibers.



The vegetative part of a fungus; consisting of a mass of branching, thread-like hyphae, through which a fungus absorbs nutrients from its environment; and excluding the fruiting, reproductive structure.


Partial veil

A protective covering over the gills or pores of a developing mushroom. At maturity it disappears, collapses into a ring around the stalk, or wears away into a cobwebby covering and ring zone.



A term often used for saprotrophic fungi. Referring to fungi that obtain their nutrients from decayed organic matter.



Striped or grooved in parallel lines (striae).



On mushrooms, having a distinct, raised, knob-like projection in the center of the cap.





New Name Needed

This species was moved to a new genus in 2015, and its common name “Wrinkled Psathyrella” moved with it. The common name now refers to its former genus. An alternate name is “Artist Crumblecap,” but that name is rarely used.

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Honey Fae (Farah)


Wrinkled-cap Psathyrella found growing out of fallen oak tree.

    Wrinkled Psathyrella   Wrinkled Psathyrella  
MinnesotaSeasons.com Photos





Typhrasa gossypina
  Typhrasa gossypina  



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Visitor Sightings

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  Honey Fae (Farah)

Location: Hennepin County

Wrinkled-cap Psathyrella found growing out of fallen oak tree.

Wrinkled Psathyrella

MinnesotaSeasons.com Sightings






Created: 8/3/2022

Last Updated:

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