Ageratina aromatica

Ageratina aromatica, also known as lesser snakeroot and small-leaved white snakeroot, is a North American species of plants in the sunflower family. It is widespread and common across much of the eastern and southern United States from Louisiana to Massachusetts, as far inland as Kentucky and Ohio. Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time. This name was used by Dioscorides for a number of different plants.