Buttonweed vs Common Silver Hairgrass

Malva neglecta compared with Aira caryophyllea

Key Differences

• Buttonweed is Least Concern while Common Silver Hairgrass is Endangered.

Taxonomic Classification

Rank	Buttonweed	Common Silver Hairgrass
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Magnoliopsida (Dicots)	Liliopsida (Monocots)
Order	Malvales (Malvales)	Poales (Grasses)
Family	Malvaceae	Poaceae (Grass Family)
Genus	Malva	Aira
Species	Malva neglecta	Aira caryophyllea

Evolutionary Relationship

Buttonweed and Common Silver Hairgrass share a common ancestor at the Phylum level: Magnoliophyta. (Flowering Plants)

Conservation Status

Buttonweed

LC — Least Concern

Common Silver Hairgrass

EN — Endangered

Physical Characteristics

Attribute	Buttonweed	Common Silver Hairgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Buttonweed

Habitat

Inhabits temperate broadleaf and mixed forests and deserts and xeric shrublands within the Palearctic biogeographic realm.

Range

Widely distributed across Africa (South Africa, Zimbabwe), Asia (6 countries), Europe (19 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Argentina, Brazil, Chile).

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.

Buttonweed

The Buttonweed (Malva neglecta) is a species in the genus Malva. It is currently classified as Least Concern on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and deserts and xeric shrublands within the Palearctic biogeographic realm.

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 12 countries:

🇦🇷 Argentina 🇦🇺 Australia 🇧🇪 Belgium 🇨🇦 Canada 🇨🇱 Chile 🇩🇰 Denmark 🇯🇵 Japan 🇳🇴 Norway 🇵🇹 Portugal 🇰🇷 South Korea 🇸🇪 Sweden 🇺🇸 United States