western buttercup/ (ranunculus occidentalis) ??

 

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Buttercups,Rough and Ready Creek, Josephine County

 

More types of buttercup flowers

Ranunculus alismifolius/Water Plantain Buttercup

Ranunculus cymbalaria/Shore Buttercup

Ranunculus eschscholtzii/Snowpatch Buttercup

Ranunculus flammula/Creeping Spearwort

Ranunculus glaberrimus/Sagebrush Buttercup

Ranunculus orthorhynchus/Swamp Buttercup

Ranunculus populago/Blue Mountain Buttercup

Ranunculus repens/Creeping Buttercup

Ranunculus sceleratus/Celery-Leaf Buttercup

Ranunculus triternatus/The Dalles Mountain Buttercup

Ranunculus uncinatus/Small-Flowered Buttercup