Eupatorium anomalum

Eupatorium anomalum, commonly called anomalous eupatorium or Florida thoroughwort,^[3] is a North American species in the family Asteraceae. It grows in the southeastern United States from Alabama to Virginia.^[4] Molecular investigations suggest that it originated as a hybrid between E. serotinum and E. mohrii but it is well-established on its own as a distinct species.^[3]

Eupatorium anomalum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Eupatorium
Species:	E. anomalum
Binomial name
Eupatorium anomalum Nash
Synonyms[1][2]
Eupatorium × anomalum Nash Uncasia anomala (Nash) Greene

Eupatorium anomalum is a tall perennial sometimes over 150 cm (5 feet) tall, producing tuberous rhizomes. It has opposite, egg -shaped leaves, and flat-topped arrays of a large number of tiny flower heads. Each head has 5 white disc florets but no ray florets.^[3][5]