1.  dog fennel(n = noun.plant) eupatorium capillifolium - weedy plant of southeastern United States having divided leaves and long clusters of greenish flowers;
is a kind of herb, herbaceous plant

2.  dog fennel(n = noun.plant) anthemis cotula, mayweed, stinking chamomile, stinking mayweed - widespread rank-smelling weed having white-rayed flower heads with yellow discs;
is a kind of composite, composite plant
is a member of anthemis, genus anthemis

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