Nasturtium
watercress
2 species
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Nasturtium microphyllum – onerow watercress
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, Montana, and Wyoming; also in the northeastern U.S.
Habitat: Shallow water, ditches, and marshy areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, Montana, and Wyoming; also in the northeastern U.S.
Habitat: Shallow water, ditches, and marshy areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
Nasturtium officinale – watercress
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Riparian zones and other wet areas.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Riparian zones and other wet areas.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Perennial
