Pontederiaceae
Pickerelweed Family
3 genera
3 species
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Eichhornia crassipeswater hyacinth
Distribution: Known from a few localities in southern Washington; California east along the southern part of the U.S. to Florida.
Habitat: Ponds, ditches, canals.
Origin: Introduced from tropical America
Flowers: April-September
Heteranthera dubiagrassleaf mud-plantain, water stargrass
Distribution: In scattered localities in Washington, however locally common and abundant in lower Yakima River; British Columbia south to California, widespread in eastern North America.
Habitat: Quiet streams, ponds and lakes.
Origin: Native
Flowers: July-September
Pontederia cordataPickerel-weed
Origin: Introduced