Brown Cup vs Fly Agaric

Rutstroemia firma compared with Amanita muscaria

Taxonomic Classification

Rank	Brown Cup	Fly Agaric
Kingdom same	Fungi (mantar)	Fungi (mantar)
Phylum	Ascomycota (Asklı mantarlar)	Basidiomycota (Bazitli mantarlar)
Class	Leotiomycetes (Leotiomycetes)	Agaricomycetes (Mushrooms)
Order	Helotiales (Helotiales)	Agaricales (Lamelli mantarlar)
Family	Rutstroemiaceae	Agaricaceae (Agarics)
Genus	Rutstroemia	Amanita (Amanitas)
Species	Rutstroemia firma	Amanita muscaria

Evolutionary Relationship

Brown Cup and Fly Agaric share a common ancestor at the Kingdom level: Fungi. (mantar)

Conservation Status

Brown Cup

LC — Least Concern

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Brown Cup	Fly Agaric
Diet	—	Decomposer
Average Lifespan	—	1 years
Average Length	—	20 cm
Average Weight	—	100 g

Habitat & Geographic Range

Brown Cup

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Brazil, Denmark, Norway, and Sweden.

Fly Agaric

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (New Zealand), and South America (Brazil, Chile, Colombia).

Brown Cup

The Brown Cup (Rutstroemia firma) is a species in the genus Rutstroemia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Fly Agaric

Among the most iconic and recognizable fungi on Earth, fly agaric mushrooms display striking red caps with white flecked warts across boreal forests of the Northern Hemisphere. Despite their fairy-tale appearance, they contain potent psychoactive compounds including muscimol and ibotenic acid and are moderately toxic. They form critical mycorrhizal symbioses with birch, pine, and spruce trees, exchanging mineral nutrients for carbon and playing essential roles in boreal forest nutrient cycling.

Shared Countries

Both species can be found in 4 countries:

🇧🇷 Brazil 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden