horned pondweed
1 species
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Zannichellia palustrishorned pondweed
Distribution: Occurring on both sides of the Cascades crest in Washington Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Fresh to brackish, standing to slow-flowing water, sea level to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial