Ranunculus glaberrimus, the sagebrush buttercup, is a species of flowering plant in the buttercup family, Ranunculaceae. It is native to interior western North America, in western Canada, the western United States, and the northwestern Great Plains.
Ranunculus glaberrimus is found from central British Columbia east to southern Saskatchewan, south through the Dakotas to Kansas, through the Rocky Mountains southeast to northern New Mexico, west to the Great Basin region, and southwest to northeastern California.
Ranunculus glaberrimus is a herbaceous perennial plant growing to 4–15 centimetres (1.6–5.9 in) tall. The somewhat thick basal leaves are oval, with long petioles, ranging from entire to having three deep lobes. Cauline leaves have short petioles but are otherwise similar. The flowers have five to ten yellow petals up to 1.3 centimeters long. The stamens and pistils are numerous.
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- "Ranunculus glaberrimus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 18 October 2015.
- "Ranunculus glaberrimus". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.
- Plants of British Columbia: Ranunculus glaberrimus
- Ranunculus glaberrimus. Flora of North America.