Grass-Wrack Pondweed vs Red-Head Pondweed

Potamogeton compressus compared with Potamogeton richardsonii

Key Differences

• Grass-Wrack Pondweed is Critically Endangered while Red-Head Pondweed is Least Concern.

Taxonomic Classification

Rank	Grass-Wrack Pondweed	Red-Head Pondweed
Kingdom same	Plantae (พืช)	Plantae (พืช)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Liliopsida (Monocots)	Liliopsida (Monocots)
Order same	Alismatales (อันดับขาเขียด)	Alismatales (อันดับขาเขียด)
Family same	Potamogetonaceae	Potamogetonaceae
Genus same	Potamogeton	Potamogeton
Species	Potamogeton compressus	Potamogeton richardsonii

Evolutionary Relationship

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

Conservation Status

Grass-Wrack Pondweed

CR — Critically Endangered

Red-Head Pondweed

LC — Least Concern

Physical Characteristics

Attribute	Grass-Wrack Pondweed	Red-Head Pondweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Red-Head Pondweed

Habitat

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

Range

Distributed across Canada, Norway, and United States.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇺🇸 United States