Anemone oregana is a species of flowering plant in the buttercup family known by the common names blue windflower, Oregon anemone, and western wood anemone. It is native to the forests of the west coast of the United States. This is a perennial herb growing from a thick rhizome to a maximum height of 25 to 30 centimeters. There is usually a single basal leaf made up of three large leaflets on a long petiole. There are sometimes more leaves along the mostly naked stem. The inflorescence has three leaflike bracts and a single flower. The flower has no petals but 5 to 7 petal-like sepals in any of several colors, usually blue or purple but sometimes reddish, pink, white, or bicolored. In the center of the flower are up to 75 thin stamens. The fruit is a cluster of achenes.