Bog Bonnet vs Common Fieldcap

Mycena concolor compared with Agrocybe pediades

Key Differences

• Bog Bonnet is Vulnerable while Common Fieldcap is Least Concern.

Taxonomic Classification

Rank	Bog Bonnet	Common Fieldcap
Kingdom same	Fungi (Fungi)	Fungi (Fungi)
Phylum same	Basidiomycota (Club Fungi)	Basidiomycota (Club Fungi)
Class same	Agaricomycetes (Mushrooms)	Agaricomycetes (Mushrooms)
Order same	Agaricales (Gilled Mushrooms)	Agaricales (Gilled Mushrooms)
Family	Mycenaceae	Strophariaceae
Genus	Mycena	Agrocybe
Species	Mycena concolor	Agrocybe pediades

Evolutionary Relationship

Bog Bonnet and Common Fieldcap share a common ancestor at the Order level: Agaricales. (Gilled Mushrooms)

Conservation Status

Bog Bonnet

VU — Vulnerable

Common Fieldcap

LC — Least Concern

Physical Characteristics

Attribute	Bog Bonnet	Common Fieldcap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bog Bonnet

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Fieldcap

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Found across Europe (5 countries) and North America (United States).

Bog Bonnet

The Bog Bonnet (Mycena concolor) is a species in the genus Mycena. It is currently classified as Vulnerable on the IUCN Red List. Distributed across Denmark, Norway, and Sweden.

Common Fieldcap

The Common Fieldcap (<em>Agrocybe pediades</em>) is a saprotrophic fungus belonging to the genus Agrocybe within the family Strophariaceae. It typically produces small, tan to pale brown cap-shaped fruiting bodies and is often found growing in clusters or scattered on lawns, grassy areas, forest floors, decomposing wood, and soil-rich ecosystems. The species typically inhabits forest floors, decomposing wood, and soil ecosystems, obtaining nutrients by breaking down dead organic matter. Its geographic range includes several European countries — Belgium, Denmark, Norway, Portugal, and Sweden — as well as the United States in North America. <em>Agrocybe pediades</em> is assessed as Least Concern on the IUCN Red List, reflecting its broad distribution and apparent stability. Biological traits of this species, including specific data on fruiting body size, lifespan, and ecological preferences, remain poorly documented in the scientific literature. Like other members of its genus, it typically fruits during warmer months and often appears after rainfall in nutrient-rich grassland and woodland habitats.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden