Diminutive Agaricus vs Fly Agaric

Agaricus diminutivus compared with Amanita muscaria

Key Differences

Diminutive Agaricus is Not Evaluated while Fly Agaric is Least Concern.

Taxonomic Classification

Rank	Diminutive Agaricus	Fly Agaric
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 same	Agaricaceae (Agarics)	Agaricaceae (Agarics)
Genus	Agaricus (Button Mushrooms)	Amanita (Amanitas)
Species	Agaricus diminutivus	Amanita muscaria

Evolutionary Relationship

Diminutive Agaricus and Fly Agaric share a common ancestor at the Family level: Agaricaceae. (Agarics)

View Family: Agaricaceae

Conservation Status

Diminutive Agaricus

NE — Not Evaluated

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Diminutive Agaricus

Habitat

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

Range

Found in United States.

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).

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.