Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast; circumboreal.
Habitat: Marshes, shorelines, and other wet areas.
Flowers: May-August
Origin: Native
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies
[none provided]
PNW Herbaria: Specimen records of Rorippa palustris ssp. palustris in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Rorippa palustris ssp. palustris checklist entry
OregonFlora: Rorippa palustris ssp. palustris information
E-Flora BC: Rorippa palustris ssp. palustris atlas page
CalPhotos: Rorippa palustris ssp. palustris photos