Anemone nemorosa is an early-spring flowering plant in the genus Anemone in the family Ranunculaceae, native to Europe. The plant contains poisonous chemicals that are toxic to animals including humans, but it has also been used as a medicine. All parts of the plant contain protoanemonin, which can cause severe skin and gastrointestinal irritation, bitter taste and burning in the mouth and throat, mouth ulcers, nausea, vomiting, diarrhea, and hematemesis. The pollen of the white flowers was examined by SEM. Image width: 116.4 micrometers. Magnification: 860x if the image is printed 10 cm wide.