Parnassia Palustris.—An infusion of the bark of this tree (Heh - "bark of this tree" - this plant is no tree, it's a teensy little herb. -Henriette) has been used in the treatment of epileptics, administered in teaspoonful doses three times daily.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.