''Eupatorium compositifolium'', commonly called Yankeeweed, is a North American herbaceous perennial plant in the family Asteraceae native to the southern United States (from North Carolina to Florida and Texas). Like other members of the genus '' Eupatorium'' it has inflorescences containing a large number of small, white flower heads, each with 5 disc florets but no ray florets. The plant is 0.5 to 2 metres (20-80 inches) tall. Flowers bloom August to October. Its habitats include sand dunes, disturbed areas, and flat-woods. It is closely related to ''

Eupatorium capillifolium ''Eupatorium capillifolium'', or dogfennel (also written "dog fennel"), is a North American perennial herbaceous plant in the family Asteraceae, native to the eastern and south-central United States. It is generally between 50 cm and 2 meter ...

'' and ''

Eupatorium leptophyllum ''Eupatorium leptophyllum'', commonly called false fennel, is a herbaceous perennial plant in the family Asteraceae native to the southeastern United States from Mississippi to the Carolinas. Like other members of the genus ''Eupatorium'', it i ...

'' and some authors consider all of them to be varieties of ''E. capillifolium''. However, ''E. compositifolium'' is not as tall as ''E. capillifolium'' and is found in drier areas. Because it is not grazed by livestock, and mostly not eaten by wildlife, it is considered undesirable in places like pastures and controlled by means such as herbicides.

References

compositifolium Flora of the United States Plants described in 1788 {{Eupatorieae-stub