What does "rattlesnake master" mean?

Any of species Eryngium yuccifolium and E. aquaticum, common herbaceous perennial plants native to the tallgrass prairies of North America.

What is a synonym for "rattlesnake master"?

Common synonyms include: button snakeroot, eryngium yuccifolium, rattlesnake's master.

noun

noun ·Rare ·Advanced level

Noun

1
Any of species Eryngium yuccifolium and E. aquaticum, common herbaceous perennial plants native to the tallgrass prairies of North America.
2
coarse prickly perennial eryngo of United States thought to cure rattlesnake bite wordnet
3
Any of species Agave virginica (syn. Manfreda virginica), a flowering plant.

The plant was reputed to cure rattlesnake bites.