The Collaborative International Dictionary
Salvia lyrata
cancerweed \cancerweed\ n. a sage of eastern U. S. ( Salvia lyrata).
Syn: cancer weed.
Wikipedia
Salvia lyrata
Salvia lyrata (lyre-leaf sage, lyreleaf sage, wild sage, cancerweed), is a herbaceous perennial in the family Lamiaceae that is native to the United States, from Connecticut west to Missouri, and in the south from Florida east to Texas. It was described and named by Carolus Linnaeus in 1753.