⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-292, with some changes.
This name is a synonym of Silphium compositum .
The record derives from TICA which reports it as a synonym (record 523F44DA-A1B6-4711-A79D-00887489B604
) with original publication details: A Flora of North America: containing . . . 2(2): 276 1842.