Fly Agaric vs Stalked Rosette

Amanita muscaria compared with Cotylidia undulata

Key Differences

Fly Agaric is Least Concern while Stalked Rosette is Data Deficient.

Taxonomic Classification

Rank	Fly Agaric	Stalked Rosette
Kingdom same	Fungi (Fungi)	Fungi (Fungi)
Phylum same	Basidiomycota (Club Fungi)	Basidiomycota (Club Fungi)
Class same	Agaricomycetes (Mushrooms)	Agaricomycetes (Mushrooms)
Order	Agaricales (Gilled Mushrooms)	Hymenochaetales (Hymenochaetales)
Family	Agaricaceae (Agarics)	Rickenellaceae
Genus	Amanita (Amanitas)	Cotylidia
Species	Amanita muscaria	Cotylidia undulata

Evolutionary Relationship

Fly Agaric and Stalked Rosette share a common ancestor at the Class level: Agaricomycetes. (Mushrooms)

View Class: Agaricomycetes

Conservation Status

Fly Agaric

LC — Least Concern

Trend: Stable →

Stalked Rosette

DD — Data Deficient

Physical Characteristics

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

Habitat & Geographic Range

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).

Stalked Rosette

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.