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Rivers

Plant Database
Long (aquatic) roots and long stem with many small green leaves
Hydrilla
Hydrilla verticillata
Invasive
Small yellow flower
Large-Flower Primrose Willow
Ludwigia grandiflora ssp. grandiflora
Invasive
Juvenile Ludwigia leaves are spatulate in shape and star-shaped in arrangement.
Six-Petal Water Primrose
Ludwigia grandiflora ssp. hexapetala
Invasive
Floating Primrose-willow Ludwigia peploides Large floating mat of long slender green leaves and small yellow flowers
Floating Primrose-Willow
Ludwigia peploides
Invasive
a carpet of parrotfeather clogs a waterbody.
Parrotfeather
Myriophyllum aquaticum
Invasive
Small stem coming out of water with small yellow flower
Yellow Floating Heart
Nymphoides peltata
Invasive
Reed Canarygrass Phalaris arundinacea Row of long grass stalks with long green slender blades and spires of seed heads
Reed Canarygrass
Phalaris arundinacea
Grass
Invasive
a patch of wapato in the river with upright arrow shaped leaves pointing upward about 2 ft tall.
Wapato
Sagittaria latifolia
Native
two-lipped fused petals of a vibrant purple-red color. In this image the bottom lip is holding a drop of water
Cooley’s Hedgenettle
Stachys cooleyae
Native
Large green shiny leaves with small yellow flower
European Waterchestnut
Trapa natans L
Invasive
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