Origin: Native
Conservation Status: Not of concern
[none provided]
Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Minnesota and Wisconsin.
Currently only known from King County in Washington; Alaska, where native, to British Columbia, where also introduced.
Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast.PNW Herbaria: Specimen records of Alisma in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Alisma checklist entry
OregonFlora: Alisma information
E-Flora BC: Alisma atlas page
CalPhotos: Alisma photos