The Waterplantain Family in the Columbia River Gorge: Alismataceae -
The Duckweed Family in the Columbia River Gorge: Araceae (formerly Lemnaceae) -
The Hornwort Family in the Columbia River Gorge: Ceratophyllaceae -
The Waterwort Family in the Columbia River Gorge: Elatinaceae -
The Water-milfoil Family in the Columbia River Gorge: Haloragaceae -
The Frog's bit Family in the Columbia River Gorge: Hydrocharitaceae -
The Quillwort Family in the Columbia River Gorge:
The Pepperwort Family in the Columbia River Gorge: Marsilaceae -
The Buckbean Family in the Columbia River Gorge: Menyanthaceae -
The Water-lily Family in the Columbia River Gorge: Nymphaceae -
Water-starworts of the Columbia River Gorge: Plantaginaceae (formerly Callitrichaceae) -
The Pondweed Family in the Columbia River Gorge: Potamogetonaceae - Include horned pondweeds of the former Zannichelliaceae.
The Burr-reed and Cat-tail Family in the Columbia River Gorge: Typhaceae - Includes the former burr-reed family (Sparganiaceae).