American Eelgrass vs common greasewort

Vallisneria americana compared with Aneura pinguis

Taxonomic Classification

Rank	American Eelgrass	common greasewort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Magnoliophyta (Flowering Plants)	Marchantiophyta (liverwort)
Class	Liliopsida (Monocots)	Jungermanniopsida (Jungermanniopsida)
Order	Alismatales (Alismatales)	Metzgeriales (Metzgeriales)
Family	Hydrocharitaceae	Aneuraceae
Genus	Vallisneria	Aneura
Species	Vallisneria americana	Aneura pinguis

Evolutionary Relationship

American Eelgrass and common greasewort share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

American Eelgrass

LC — Least Concern

common greasewort

LC — Least Concern

Physical Characteristics

Attribute	American Eelgrass	common greasewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

American Eelgrass

Habitat

Found across multiple habitat types including deserts and xeric shrublands, tropical and subtropical moist broadleaf forests, and tropical and subtropical grasslands and savannas, among 4 distinct biome types spanning the Palearctic and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Egypt), Asia (Taiwan), Europe (Belgium, Italy), North America (5 countries), and South America (Colombia).

common greasewort

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (United States), and South America (Brazil, Colombia).

American Eelgrass

The American Eelgrass (Vallisneria americana) is a species in the genus Vallisneria. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including deserts and xeric shrublands, tropical and subtropical moist broadleaf forests, and tropical and subtropical grasslands and savannas, among 4 distinct biome types spanning the Palearctic and Neo.

common greasewort

<em>Aneura pinguis</em>, commonly known as common greasewort, is a liverwort belonging to the genus Aneura within the family Aneuraceae. This cryptogamic plant inhabits ecosystems across Asia, Europe, and North America, thriving in moist or waterlogged environments. Its range encompasses Taiwan in Asia, six European countries, the United States in North America, and Brazil and Colombia in South America, indicating a broad geographic distribution across multiple continents. Common greasewort is assessed as Least Concern on the IUCN Red List. The species typically forms flat, ribbon-like thalli in damp habitats such as stream banks, wet rocks, and boggy ground. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇨🇴 Colombia 🇹🇼 Taiwan 🇺🇸 United States