- an annual weed (Anthemis cotula) of the composite family, having daisylike flower heads with white rays and yellow centers, and an offensive smell; mayweed
- ☆ a tall, annual weed (Eupatorium capillifolium) of the composite family, with finely divided leaves and a terminal cluster of tiny, rayless flower heads
- heath aster
- A weedy plant (Eupatorium capillifolium) in the composite family, native to the southeast United States and having pinnately divided leaves and long clusters of greenish flowers.
- See mayweed.