Eupatorium compositifolium, commonly called yankeeweed[3] and coastal dog fennel,[4][5] is a North American herbaceous perennial plant in the family Asteraceae native to the southern United States (from North Carolina to Florida and Texas).

[6] 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.

Its habitats include sand dunes, disturbed areas, and flat-woods.

[8] However, E. compositifolium is not as tall as E. capillifolium and is found in drier areas.

[9] 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.