Commelinaceae
Spiderwort Family
2 genera
1 species
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Murdannia keisakwart-removing-herb
Distribution: Occurring west of the Cascades crest in the Lower Columbia River corridor in Washington; southwestern Washington and adjacent northwestern Oregon; also in southeastern United States.
Habitat: Ditches, swales and swamps, often in water.
Origin: Introduced from Asia
Flowers: August-October
Growth Duration: perennial