[Buttercups: The Genus Ranunculus in the Columbia River Gorge of Oregon and Washington]

Basalt Buttercup

Ranunculus basalticus

A voucher specimen of basalt buttercup as seen in the Klickitat Wildlife Area..........March 21, 2014. This specimen was sent to the Washington Territorial Herbarium at the University of Washington.

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Basalt buttercup as seen in the Klickitat Wildlife Area......March 21, 2014.

A close-up of the petals of the basalt buttercup. Note the shallowly notched nectary.

Close-ups of the maturing achenes as well as a petal. Note the deeply grooved nectary at the base (upper portion of the petal). Photographed April 23, 2009.

A close-up of the underside of the flower of basalt buttercup. Note the large size of the flower where the petals can measure over 10 mm in length.

Note the trifoliate leaves as well as the glabrous leaves and stems. Each leaflet is shallowly to deeply 3-lobed or parted.

Comparison photos to the Dalles Mt. buttercup (Ranunculus triternatus - left) and sagebrush buttercup (Ranunculus glaberrimus - right).

Basalt buttercup as seen in the Klickitat Wildlife Area.......March 1, 2015.

Paul Slichter