Earthy Powdercap

(Cystoderma amianthinum)

Conservation Status

Earthy Powdercap
Photo by Bobbi Johnson
IUCN Red List

not listed

 
NatureServe

not listed

 
Minnesota

not listed

 
     
     

Description

Earthy Powdercap is a common and widespread, small to medium-sized, gilled mushroom. It occurs in Europe, Asia, North America, and southern Australia. It occurs throughout most of the northern United States and southern Canada, but it is absent from the Great Plains and the Great Basin. It is found in late summer and fall; alone, scattered, or in groups but not clustered (gregarious); in coniferous and mixed woodlands. It grows on the ground, usually on moss but also on fallen leaves in mixed woodlands and on needle carpets in coniferous woodlands. It obtains its nutrients from decayed organic matter (saprobic).

When it first appears, the cap is convex, broadly cone-shaped, or bell-shaped. The color is variable, and different forms have been described on the basis of young cap color. The typical form is yellow to yellowish brown or orangish brown, one form is olive colored, and one form is white. The mature cap is broadly convex, broadly bell-shaped, or nearly flat. The surface is covered with dry, mealy granules, which are often washed off by rain, and it may be conspicuously radially wrinkled, slightly wrinkled, or smooth. The margin is often hung with remnants of the partial veil.

The gills are closely spaced or crowded, and they may be narrowly or broadly attached to the stalk. They are white or cream-colored at first, becoming yellowish or yellowish orange with age.

The stalk is 1 to 2¾ (2.5 to 7.0 cm) long and to 516 (3 to 8 mm) thick. It may be the same size from top to bottom or slightly enlarged toward the base. There is a flimsy ring at first, a remnant of the partial veil, but this often fragments or completely disappears with age. Above the ring the stalk is pale or whitish and smooth. Below the ring the stalk is colored like the cap and is sheathed with mealy granules. Shielded by the cap above, the granules are not washed off by rain.

The flesh is thin and whitish. It is not poisonous, but eating is not recommended because it can easily be confused with the deadly poisonous Lepiota castanae.

The spore print is white.

Similar Species

 

Habitat and Hosts

Coniferous and mixed woodlands

Ecology

Season

Late summer and fall

Distribution

Distribution Map

 

Sources

7, 24, 26, 29, 30, 77.

Biodiversity occurrence data published by: Minnesota Biodiversity Atlas (accessed through the Minnesota Biodiversity Atlas Portal, bellatlas.umn.edu, 11/28/2025).

11/28/2025    
     

Occurrence

 

Taxonomy

Kingdom

Fungi (Fungi)

Subkingdom

Dikarya

Phylum

Basidiomycota (Basidiomycete Fungi)

Subphylum

Agaricomycotina (Higher Basidiomycetes)

Class

Agaricomycetes (Mushrooms, Bracket Fungi, Puffballs, and Allies)

Subclass

Agaricomycetidae

Order

Agaricales (Common Gilled Mushrooms and Allies)

Suborder

Agaricineae

Family

Squamanitaceae

Genus

Cystoderma (Powdercaps)

Subordinate Taxa

Several forms and varieties have been described based on the color of the cap, the amount of wrinkling on the cap, and the shape of the spores. Sources vary on the number of names and the rank of the subordinate taxa that are recognized. Two varieties have been separated as a distinct species by some sources. GBIF recognizes no subordinate taxa and treats all of the remaining names as synonyms.

 

Earthy Powdercap (Cystoderma amianthinum f. album)

Earthy Powdercap (Cystoderma amianthinum var. amianthinum)

Earthy Powdercap (Cystoderma amianthinum var. rugosoreticulatum)

Synonyms

Agaricus amianthinus

Agaricus amianthinus var. broadwoodiae

Agaricus granulosus var. amianthinum

Agaricus granulosus var. amianthinus

Agaricus granulosus x amianthinus

Agaricus ochraceus

Agaricus rugosoreticulatus

Armillaria amianthina

Armillaria rugosoreticulata

Cystoderma amianthinum f. album

Cystoderma amianthinum f. olivaceum

Cystoderma amianthinum f. rugosoreticulatum

Cystoderma amianthinum f. rugulosoreticulatum

Cystoderma amianthinum ssp. album

Cystoderma amianthinum ssp. rugosoreticulatum

Cystoderma amianthinum ssp. rugulosoreticulatum

Cystoderma amianthinum var. album

Cystoderma amianthinum var. rugosoreticulatum

Cystoderma longisporum f. rugosoreticulatum

Cystoderma longisporum ssp. rugosoreticulatum

Cystoderma rugosoreticulatum

Cystoderma sublongisporum

Lepiota amianthina

Lepiota amianthina ssp. alba

Lepiota amianthina var. alba

Lepiota amianthina var. broadwoodiae

Lepiota amianthina var. broadwoodiae

Lepiota amianthina var. evae

Lepiota granulosa ssp. amianthina

Lepiota granulosa var. amianthina

Lepiota granulosa var. ochracea

Lepiota rugosoreticulata

Common Names

Earthy Powdercap

Unspotted Cystoderma

 

 

 

 

 

Glossary

Partial veil

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

 

Saprobic

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

 

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Earthy Powdercap

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Cystoderma amianthinum
Mushrooms Fungi

About

Aug 29, 2020

Cystoderma amianthinum (Scop.) Fayod
Family: Agaricaceae

Syn: Lepiota amianthina (Scop.) P. Karst.

Cystoderma amianthinum
Domenico Memoli

About

Jun 5, 2019

Riprese Diavolorosso

 

slideshow

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Red mushroom
Ajaydeep Maurya

About

Aug 16, 2024

Cystoderma amianthinum, commonly called the saffron parasol, the saffron powder-cap, or the earthy powder-cap, is a small orange-ochre, or yellowish-brown, gilled mushroom. It grows in damp mossy grassland, in coniferous forest clearings, or on wooded heaths. It is probably the most common of the small genus Cystoderma. It is not recommended for consumption due to its resemblance to poisonous species.

 

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Bobbi Johnson
Fall 2025

Earthy Powdercap

Location: Silver Bay, MN

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