" rattlesnake root "

[Noun]  | "rattlesnake root" 

1: any of various plants formerly believed to be distasteful to rattlesnakes or effective against their venom: such as

2: any of a genus (Prenanthes, especially P. altissima) of composite plants with small heads of drooping ligulate flowers

3: seneca snakeroot

Origin: 1682 ;

[Noun]  | "seneca snakeroot" 

1: a milkwort (Polygala senega) of eastern North America having racemes of small white flowers —called also rattlesnake root, senega root

Origin: 1739 ;