Anemone deltoidea is a species of flowering plant in the buttercup family known by the common names Columbian windflower and western white anemone. It is native to the forests of the west coast of the United States. This is a rhizomatous perennial herb growing between 10 and 30 centimeters tall. There is usually a single basal leaf which is divided into three large toothed leaflets, each up to 6 centimeters long.