Triadenum
marsh
1 species
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Triadenum fraseri – marsh St. John's wort
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to southwestern Washington.
Habitat: Peatlands, ditches, sandy shores, floating logs, and cranberry farms.
Origin: Introduced from eastern North America
Flowers: July-September
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to southwestern Washington.
Habitat: Peatlands, ditches, sandy shores, floating logs, and cranberry farms.
Origin: Introduced from eastern North America
Flowers: July-September
Growth Duration: Perennial
