Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and across the northern U.S. and Canada to the Atlantic Coast; circumboreal.

Habitat: Shallow water or mud flats of ponds, lakes, slow-moving streams, tidal flats, wet meadows, and marshes.

Flowers: July-September

Origin: Native

Growth Duration: Annual

Conservation Status: Review Group 1 in Washington (WANHP)

Pollination: Bees, flies, butterflies

[none provided]