Black hellebore vs Common Silver Hairgrass

Helleborus niger compared with Aira caryophyllea

Key Differences

• Black hellebore is Not Evaluated while Common Silver Hairgrass is Endangered.

Taxonomic Classification

Rank	Black hellebore	Common Silver Hairgrass
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Magnoliophyta (被子植物門)	Magnoliophyta (被子植物門)
Class	Magnoliopsida (モクレン綱)	Liliopsida (単子葉植物綱)
Order	Ranunculales (キンポウゲ目)	Poales (イネ目)
Family	Ranunculaceae	Poaceae (Grass Family)
Genus	Helleborus	Aira
Species	Helleborus niger	Aira caryophyllea

Evolutionary Relationship

Black hellebore and Common Silver Hairgrass share a common ancestor at the Phylum level: Magnoliophyta. (被子植物門)

Conservation Status

Black hellebore

NE — Not Evaluated

Common Silver Hairgrass

EN — Endangered

Physical Characteristics

Attribute	Black hellebore	Common Silver Hairgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black hellebore

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (8 countries) and North America (Canada, United States).

Common Silver Hairgrass

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Cameroon), Asia (Japan, South Korea), Europe (6 countries), North America (4 countries), Oceania and the Pacific (Australia), and South America (4 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black hellebore

The Black hellebore (Helleborus niger) is a species in the genus Helleborus. Typically found in diverse terrestrial habitats from tropical forests to temperate regions. Found across Europe (8 countries) and North America (Canada, United States).

Common Silver Hairgrass

<em>Aira caryophyllea</em>, commonly known as Common Silver Hairgrass, is a slender annual grass belonging to the family Poaceae within the order Poales. This delicate grass is currently classified as Endangered on the IUCN Red List, reflecting significant conservation concern despite its historically broad distribution. It is typically found across a remarkable diversity of biome types, including tropical and subtropical moist broadleaf forests, grasslands, savannas, and flooded habitats, demonstrating notable ecological versatility. Its geographic range spans multiple continents, with documented populations in Africa (Cameroon), Asia (Japan, South Korea), Europe, North America, Australia, and South America. As an annual grass, it completes its life cycle within a single growing season, reproducing via wind-dispersed seeds. The inflorescence typically bears silvery, shimmering spikelets that give the species its common name. Biological traits such as average lifespan, body dimensions, and dietary specifics follow typical patterns for annual grasses — drawing nutrients from soil through root absorption rather than consuming other organisms. The endangered status suggests populations may be declining due to habitat loss, land-use change, or invasive species pressure across parts of its range.

Shared Countries

Both species can be found in 6 countries:

🇧🇪 Belgium 🇨🇦 Canada 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States