[Buttercups: The Genus Ranunculus East of the Cascade Mountains of Oregon and Washington]

Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot

Ranunculus aquatilis var. diffusus

Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus

Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus)

White water buttercup (variety diffusus) as seen in a vernal stream at the wildlife viewing area in Logan Valley, Malheur National Forest.........June 26, 2011. Note that all the leaves are similar (filiform).

Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus) - Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus)

White water buttercup (var. diffusus) as seen (left) in drying muds of a stream passing through Summit Prairie, Malheur National Forest...........August 20, 2011. The photo at right shows white water buttercup (var. diffusus) as seen in the North Fork Crooked River about one and one-quarter mile south of the junctions of FS Roads #42 and #4215, Ochoco National Forest.........June 12, 2015.

Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus) - Leaves of Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus)

White water buttercup blooming at a stock pond on the downhill side of Box Canyon Road near the current (2021) boundary of the Simcoe Mountains Unit of the Klickitat Wildlife Area......May 10, 2021.

Threadleaf Crowfoot, Water Buttercup, White Water Buttercup, White Water Crowfoot: Ranunculus aquatilis var. diffusus (Synonyms: Ranunculus aquatilis var. caespitosus, Ranunculus aquatilis var. capillaceus, Ranunclus aquatilis var. porteri, Ranunculus aquatilis var. subrigidus, Ranunculus aquatilis var. trichophyllus, Ranunculus longirostris, Ranunculus subrigidus, Ranunculus trichophyllus, Ranunculus trichophyllus var. trichophyllus)

View showing the filiform leaf segments of white water buttercup (var. diffusus) as seen in a small stream in the Klickitat State Wildlife Area of south-central Washington............June 12, 2009.

Paul Slichter