Non-native, Invasive, Freshwater Plants

Table of Contents

Aquatic Plants

Overview of Freshwater Noxious Weeds in Washington

Aquatic and Wetland Plants Whose Sales are Prohibited in Washington State

Washington State Aquatic Plant Survey Information

Each year Ecology conducts site visits to identify aquatic plants. Access these survey results on-line to see distribution data for aquatic plants in Washington.

Brazilian Elodea (Egeria densa)

Eurasian Watermilfoil (Myriophyllum spicatum)

Fanwort (Cabomba caroliniana)

Fragrant Water Lily (Nymphaea odorata)

Hydrilla (Hydrilla verticillata)

Characteristics of the Hydrocharataceae

Parrotfeather (Myriophyllum aquaticum)

Greater Bladderwort (Utricularia inflata)

Water Hyacinth (Eichhornia crassipes)

Water Primrose (Ludwigia hexapetala)

Yellow Floating Heart (Nymphoides peltata)

Wetland and Riparian Zone Plants

Garden Loosestrife (Lysimachia vulgaris)

Hairy Willow-Herb (Epilobium hirsutum)

Indigobush (Amorpha fruticosa)

Japanese Knotweed (Polygonum cuspidatum)

Purple Loosestrife (Lythrum salicaria)

Reed Canarygrass (Phalaris arundinacea)

Saltcedar (Tamarix ramosissima)

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