Distribution: Known from a few locations in northwestern Washington; Alaska to California, east to the Rocky Mountains and across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Shallow water or mud flats of ponds, lakes, slow-moving streams, tidal flats, wet meadows, and marshes.
Growth Duration: Annual
Conservation Status: Review Group 1 in Washington (WANHP)
Pollination: Bees, flies, butterflies