Skunk Cabbage: The Arum Family: Araceae
The Bladderwort Family: Lentibulariaceae
The Bur-reed Family: Sparganiaceae
The Cat-tail Family: Typhaceae
The Duckweed Family: Lemnaceae
The Frog's-bit Family: Hydrocharitaceae
The Hornwort Family: Ceratophyllaceae
The Mare's-tail Family: Hippuridaceae
The Pondweed Family: Potamogetonaceae
The Quillwort Family: Isoetaceae
Rannoch-rush, American Scheuchzeria, Podgrass, Scheuchzeria: Scheuchzeria palustris (Synonyms: Scheuchzeria americana, Scheuchzeria palustris ssp. americana, Scheuchzeria palustris var. americana)
The Waterlily Family: Nymphaeaceae
The Water Plantain Family: Alismataceae
The Water-starwort Family: Plantaginaceae (formerly Callitrichaceae)