Cactus-apple vs Fly Agaric

Opuntia engelmannii compared with Amanita muscaria

Taxonomic Classification

Rank	Cactus-apple	Fly Agaric
Kingdom	Plantae (Plants)	Fungi (Fungi)
Phylum	Magnoliophyta (Flowering Plants)	Basidiomycota (Club Fungi)
Class	Magnoliopsida (Dicots)	Agaricomycetes (Mushrooms)
Order	Caryophyllales (Caryophyllales)	Agaricales (Gilled Mushrooms)
Family	Cactaceae	Agaricaceae (Agarics)
Genus	Opuntia	Amanita (Amanitas)
Species	Opuntia engelmannii	Amanita muscaria

Conservation Status

Cactus-apple

LC — Least Concern

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Cactus-apple	Fly Agaric
Diet	—	Decomposer
Average Lifespan	—	1 years
Average Length	—	20 cm
Average Weight	—	100 g

Habitat & Geographic Range

Cactus-apple

Habitat

Inhabits tropical and subtropical grasslands and savannas within the Afrotropic biogeographic realm.

Range

Widely distributed across Africa (5 countries), Europe (4 countries), and Oceania and the Pacific (Australia).

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).

Cactus-apple

The Cactus-apple (Opuntia engelmannii) is a species in the genus Opuntia. It is currently classified as Least Concern on the IUCN Red List. Inhabits tropical and subtropical grasslands and savannas within the Afrotropic biogeographic realm.

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.