Formerly Eupatorium fistulosum, but the genus Eupatorium has been split into several genera. This beautiful and elegantly constructed plant, also known as Trumpetweed, bears domes of dusty mauve flower heads on towers of whorled leaves, usually five to seven in a whorl. The plants can easily grow to seven feet or more. They prefer a damp environment, and are often seen in the soggier parts of roadsides and fields.

These plants were growing in the native-plant field in Robin Hill Park, Moon Township.

For a description of the species, see the Eutrochium fistulosum reference page.