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:
euphorbia lathyris spurge euphorbia spurge family euphorbiaceae seeds seed capsules encapsulate toxic ingenol ingeol ester witches milk devil milk poison milk woodpecker root spring root spring wolf milk fourline spurge vole wolf milk wart herbal
Page 2017 Free-images.com. All images are Public Domain