The photo above shows sagebrush buttercup as seen from Quilomene Wildlife Area to the west of Vantage, WA.........March 29, 2007.
Sagebrush buttercup is a perennial with several erect to prostrate stems. The stems are 5-20 cm long and may be simple to branched above. The leaves are mainly basal. The blades are somewhat fleshy, elliptic to obovate (sometimes nearly round) in shape with margins ranging from entire to deeply 3-lobed at the distal end. The leaf blade tapers gradually to the petiole which may be as long as to several times longer than the blade. One to several stem leaves may be present.
The flowers are shiny yellow, with 5 petals 8-15 mm long. The 5 sepals are spreading, and purplish-tinged, 5-8 mm long. 40-80 stamens occupy the centeral of the floral disk.
This is an attractive, large-flowered buttercup that would be attractive in the wild prairie garden. I don't believe that anyone offers this plant at wildflower nurseries at this time.
Sagebrush buttercup is found in ponderosa pine woodlands and in the sagebrush desert. Variety ellipticus is primarily montane, while variety glaberrimus is a plant of lower elevation.
Sagebrush buttercup is a widespread species, found from British Columbia south along the eastern edge of the Cascades and Sierra Nevada Mts. to central California, and eastward across Oregon and Washington to the Dakotas, and south to New Mexico.
The photo above shows sage-brush buttercup as seen along the Deschutes River Access Road several miles below Sherar's Bridge in north-central Oregon..........March 24, 2007.
The photo at right shows a close-up of the underside of the flower of sagebrush buttercup (R. glaberrimus var. glaberrimus) as seen on BLM lands in Cowiche Canyon, to the west of Yakima, WA.............March 28, 2007. Note the brownish (although usually greenish) sepals.
-Sagebrush buttercups blooming along Oregon Highway 218 about one mile south of Shaniko, Oregon..........March 10, 2015.
-Sagebrush buttercups blooming on rocky rims at the edges of scablands near FS Road 4230-050 south of Long Prairie, Ochoco National Forest........April 30, 2016.
Ranunculus glaberrimus var. ellipticus from Winter Ridge, Fremont N.F.......May 26, 1996.
The photo above shows a close-up of the flower of sagebrush buttercup as seen from open woods near Hog Lake, to the east of Sprague, WA..........April 29, 2006.
-The photo at left shows sagebrush buttercup (R. glaberrimus var. glaberrimus) as seen along the Vantage Highway west of Vantage, WA, in the Quilomene Wildlife Area.........May 29, 2007. The photo at right shows sagebrush buttercup blooming along Forest Road 2630 about a half mile uphill to the northwest of Scotts Campground, Ochoco National Forest.........May 10, 2017.