It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
meadows sauerampfer inflorescence rumex acetosa large sauerampfer sorrel sour lump polygalas polygonaceae wild vegetables medicinal plant thyrsenfoermig total pollen green rispig flowers
Page 2017 Free-images.com. All images are Public Domain