Eel-Grass Pondweed vs Grass-Wrack Pondweed

Potamogeton zosteriformis compared with Potamogeton compressus

Key Differences

• Eel-Grass Pondweed is Not Evaluated while Grass-Wrack Pondweed is Critically Endangered.

Taxonomic Classification

Rank	Eel-Grass Pondweed	Grass-Wrack 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 zosteriformis	Potamogeton compressus

Evolutionary Relationship

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

Conservation Status

Eel-Grass Pondweed

NE — Not Evaluated

Grass-Wrack Pondweed

CR — Critically Endangered

Physical Characteristics

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

Habitat & Geographic Range

Eel-Grass Pondweed

Habitat

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

Range

Distributed across Canada, Norway, and United States.

Grass-Wrack Pondweed

Habitat

Inhabits temperate broadleaf and mixed forests and boreal forests and taiga within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (6 countries) and North America (United States). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇺🇸 United States