Bitter Scalewort vs Fly Agaric

Porella arboris-vitae compared with Amanita muscaria

Key Differences

Bitter Scalewort is Vulnerable while Fly Agaric is Least Concern.

Taxonomic Classification

Rank	Bitter Scalewort	Fly Agaric
Kingdom	Plantae (Plants)	Fungi (Fungi)
Phylum	Marchantiophyta (liverwort)	Basidiomycota (Club Fungi)
Class	Jungermanniopsida (Jungermanniopsida)	Agaricomycetes (Mushrooms)
Order	Porellales (Porellales)	Agaricales (Gilled Mushrooms)
Family	Porellaceae	Agaricaceae (Agarics)
Genus	Porella	Amanita (Amanitas)
Species	Porella arboris-vitae	Amanita muscaria

Conservation Status

Bitter Scalewort

VU — Vulnerable

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Bitter Scalewort

Habitat

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

Range

Found across Asia (Taiwan) and Europe (5 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its 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).

Bitter Scalewort

The Bitter Scalewort (Porella arboris-vitae) is a species in the genus Porella. It is currently classified as Vulnerable on the IUCN Red List. Native to Asia and Europe, 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.