Clasped Pondweed vs Eel-Grass Pondweed

Potamogeton perfoliatus compared with Potamogeton zosteriformis

Key Differences

• Clasped Pondweed is Endangered while Eel-Grass Pondweed is Not Evaluated.

Taxonomic Classification

Rank	Clasped Pondweed	Eel-Grass Pondweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Liliopsida (Monocots)	Liliopsida (Monocots)
Order same	Alismatales (Alismatales)	Alismatales (Alismatales)
Family same	Potamogetonaceae	Potamogetonaceae
Genus same	Potamogeton	Potamogeton
Species	Potamogeton perfoliatus	Potamogeton zosteriformis

Evolutionary Relationship

Clasped Pondweed and Eel-Grass Pondweed share a common ancestor at the Genus level: Potamogeton.

Conservation Status

Clasped Pondweed

EN — Endangered

Eel-Grass Pondweed

NE — Not Evaluated

Physical Characteristics

Attribute	Clasped Pondweed	Eel-Grass Pondweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Clasped Pondweed

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests, among 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Saudi Arabia), Europe (8 countries), North America (Canada, Cuba, United States), and Oceania and the Pacific (New Zealand). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Eel-Grass Pondweed

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Distributed across Canada, Norway, and United States.

Clasped Pondweed

The Clasped Pondweed (Potamogeton perfoliatus) is a species in the genus Potamogeton. It is currently classified as Endangered on the IUCN Red List. Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests, among 8 distinct biome types. Populations are also found in montane and highland environments

Shared Countries

Both species can be found in 3 countries:

🇨🇦 Canada 🇳🇴 Norway 🇺🇸 United States