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

Western Buttercup

Ranunculus occidentalis var. occidentalis

Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

The photo at left shows western buttercup as seen in grassy oak woodlands along Interstate 5 near Exit One in southern Oregon........April 6, 2009. The photo at right shows western buttercup as seen at Camassia Nature Preserve, West Linn, OR......March 29, 2018.

Flower of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Leaf of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Close-up images of the shiny yellow flower and a leaf of western buttercup. Photographed in open coniferous woods along the Illinois River to the southwest of Selma, OR.........April 5, 2009.

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Flower of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Leaf of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Flower of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Flower of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Sepals of Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Additional photos of western buttercup as seen on slopes near the summit of Saddle Mountain in the Coast Range of northwestern Oregon.........May 21, 2009.

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Western buttercups observed along the Jeffrey Pine Trail Loop (BLM), south side of Eight Dollar Mountain, Josephine County, OR......April 21, 2021.

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Seedlings of western buttercup growing in the webmaster's garden in Gresham, Oregon.......April 27, 2020.

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Western buttercup as seen at left along the summit ridge of Saddle Mountain the northern Coast Range of Oregon.........May 2, 2016. The photo at right shows western buttercup beginning to bloom in meadows at Sitka Sedge State Natural Area.......April 20, 2019.

Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus) - Western Buttercup: Ranunculus occidentalis var. occidentalis (Synonyms: Ranunculus occidentalis var. dissectus, Ranunculus occidentalis var. eisenii, Ranunculus occidentalis var. howellii, Ranunculus occidentalis var. occidentalis, Ranunculus occidentalis var. rattanii, Ranunculus occidentalis var. ultramontanus)

Western buttercup observed at left at the Days Gulch Botanical Area about one-half mile southwest of the Green Bridge over the Illinois River, Josephine County, OR......April 21, 2021. The photo at right shows western buttercup observed at the Eight Dollar Mountain Botanical Wayside, Josephine County, OR.....April 21, 2021.

Paul Slichter