Distribution: Occurring west of the Cascades crest along the outer coast; Alaska to Washington, east to southwestern Alberta; also in eastern Asia.
Habitat: Aquatic, sometimes in tidal habitats, from the lowlands to montane.
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
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PNW Herbaria: Specimen records of Isoetes maritima in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Isoetes maritima checklist entry.
OregonFlora: Isoetes maritima information.
E-Flora BC: Isoetes maritima atlas page.
CalPhotos: Isoetes maritima photos.
USDA Plants: Isoetes maritima information.