Rattlesnake Master, a native species, has been added to the USWildflowers database (10/28/2013.) Scientific name is Eryngium yuccifolium. Also known as Button Eryngo, Button Snakeroot, amd Yuccaleaf Eryngo. Photo below was taken along Ascalon Road, Walker County, GA on August 4, 2013. Go to the Rattlesnake Master detail page for more photos and information.