button snakeroot

noun

1. any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads

   Synonym:    blazing stargayfeathergay-feathersnakeroot

2. coarse prickly perennial eryngo with aromatic roots

   Synonym:    Eryngium aquaticum

3. coarse prickly perennial eryngo of United States thought to cure rattlesnake bite

   Synonym:    rattlesnake masterrattlesnake's masterEryngium yuccifolium