Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: In sluggish streams, ponds, lakes, and mudflats at low to moderate elevations.
Flowers: May-August
Origin: Native
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies, beetles
[none provided]
PNW Herbaria: Specimen records of Ranunculus aquatilis var. diffusus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Ranunculus aquatilis var. diffusus checklist entry
OregonFlora: Ranunculus aquatilis var. diffusus information
E-Flora BC: Ranunculus aquatilis var. diffusus atlas page
CalPhotos: Ranunculus aquatilis var. diffusus photos