Names this plant has been called.
Ageratum, Snake root, White snake root, White Sanicle , Tall Boneset
Tremetol is toxic. When cattle eat it, it gets in the milk and passed into humans will poison. Also called milk sickness.
Nancy Hanks Abraham Lincoln's mother died of this. Thousands died in the 19th century before they realized what the plant was.
Early settlers thought the bitter rhizomes were beneficial in the treatment of snakebites. That's where the snakeroot name came from.