Synonyms for Button Snakeroot (same or very similar meaning)
WordNet sense 1 (any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads):
gayfeather, gay-feather, snakeroot, blazing starWordNet sense 2 (coarse prickly perennial eryngo of United States thought to cure rattlesnake bite):
rattlesnake master, Eryngium yuccifolium, rattlesnake's masterWordNet sense 3 (coarse prickly perennial eryngo with aromatic roots; southeastern United States; often confused with rattlesnake master):
Eryngium aquaticumFrom the ODE community, based on WordNetadd/edit