It is of the genus Pulsatilla.
It is the state flower of South Dakota and is the provincial flower of Manitoba, Canada. It grows well in northwestern U.S. to upper Alaska, and central and northern Europe.
Physicians of old used the flower to treat ulcers and as a topical application for inflamed eyes, toothache and headache. It is used today for several medical issues and is found in several medications today.
Although it has a strong acrid taste goats and sheep will eat it. Then what will goats not eat?
One Greek legend has Adonis hunting wild boar on Mt. Lebanon, as he was want to do, when he was gored by the fierce animal. Where his blood fell to earth pasque flowers sprang up.
The flower petals close up at sundown giving imaginative rural folks of the past in northern and central Europe the idea that the closed petals would be a wonderful shelter for woodland fairies. It has not been recorded if anyone actually saw a fairy resting within a closed blossom, but who are we to question these fine folks. After all, fairies must find shelter somewhere.