American settlers of the 18th and 19th century learned of its use from the native american tribes who used it to prevent miscarriage. Listed in the U.S. National Formulary from 1916-47
The long trailing roots of False Unicorn root, so the legend goes, possessed not only extremely beneficial healing properties, but extraordinary magic. This so angered the Devil, that he bit off all the roots, his rage so powerful that to this day the roots have not been able to grow back. But the remaining stub is still imbued with good medicine, and every spring it is able to put forth the tall spike of beautiful blazing-star blossoms as a reminder that the power of goodness can always avert the forces of evil.