Common Foxglove vs Common Silver Hairgrass

Digitalis purpurea compared with Aira caryophyllea

Key Differences

Common Foxglove is Not Evaluated while Common Silver Hairgrass is Endangered.

Taxonomic Classification

Rank	Common Foxglove	Common Silver Hairgrass
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Magnoliopsida (Dicots)	Liliopsida (Monocots)
Order	Lamiales (Lamiales)	Poales (Grasses)
Family	Plantaginaceae	Poaceae (Grass Family)
Genus	Digitalis	Aira
Species	Digitalis purpurea	Aira caryophyllea

Evolutionary Relationship

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

View Phylum: Magnoliophyta

Conservation Status

Common Foxglove

NE — Not Evaluated

Common Silver Hairgrass

EN — Endangered

Physical Characteristics

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

Habitat & Geographic Range

Common Foxglove

Habitat

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

Range

Widely distributed across Africa (Zimbabwe), Asia (5 countries), Europe (16 countries), North America (4 countries), Oceania and the Pacific (Australia, New Zealand), and South America (5 countries).

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.

Common Foxglove

Digitalis purpurea is a biennial or short-lived perennial plant in the family Plantaginaceae, order Lamiales, commonly known as common foxglove. This species is widely cultivated as an ornamental plant and has been naturalized broadly across the globe, with presence documented across Africa, Asia, Europe, North America, Oceania, and South America. Digitalis purpurea typically grows in open woodlands, woodland clearings, hillsides, and disturbed ground, particularly on acidic, well-drained soils. In its first year, the plant forms a rosette of large, softly hairy leaves; in its second year it produces a tall flower spike, often exceeding one meter, bearing distinctive tubular, purple-pink flowers with spotted throats. The flowers are adapted for pollination by bumblebees. The plant contains potent cardiac glycosides, particularly digitoxin and digoxin, compounds that have been critically important in the development of heart failure medications. Despite its medicinal importance, the plant is toxic if ingested. Biological traits of this species remain poorly documented in the scientific literature.

Common Silver Hairgrass

Aira caryophyllea, 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.