Anemone virginiana.

Botanical name: 
Anemone virginiana

ANEMONE VIRGINICA, L. Windbloom. Kalm says the hairy seeds dipped in alcohol, are used in odontalgy, being put in the hollow teeth.

Medical Flora, or Manual of the Medical Botany of the United States of North America, Vol. 2, 1830, was written by C. S. Rafinesque.