Eupatorium anomalum, commonly called anomalous eupatorium or Florida thoroughwort, is a North American species in the family Asteraceae. It grows in the southeastern United States from Alabama to Virginia.Biota of North America Program 2014 county distribution map 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.Flora of North America, Eupatorium anomalum Nash, 1896. Florida thoroughwort
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.Nash, George Valentine 1896. Bulletin of the Torrey Botanical Club 23(3): 106
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