– lowland cudweed, western marsh cudweed
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Great Plains.
Habitat: Open areas at low elevations where moist at least in spring.
– marsh cudweed
Distribution: Widespread throughout Washington; Alaska south to Oregon, east across the central U.S. and Canada to the Atlantic Coast.
Habitat: Moist areas, streambanks and waste ground.