Tanacetum vulgare is a(n) perennial forb, which grows 0.5 m to 1.5 m in height. This species is commonly found at low to mid elevations of the central and northern Black Hills and the Bear Lodge Mts.; stream margins, floodplains, roadsides, and disturbed habitats; introduced from Eurasia as an ornamental and medicinal plant. The leaves are alternating, numreous, pinnately dissected. Tanacetum vulgare has many yellow, discoid, button- like headed flowers that bloom from July to September.