Any member of the genus Ageratina of perennials and rounded shrubs from the sunflower family, growing mainly in the warmer regions of the Americas.
User Defined Definitions
"a plant of the genus Sanicula having palmately compound leaves and unisexual flowers in panicled umbels followed by bristly fruit; reputed to have healing powers"
"any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads"