⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-55936, with some changes.

Silphium compositum subsp. ovatifolium (Torr. & A.Gray) is a synonym of Silphium compositum Michx.

This name is a synonym of Silphium compositum Michx..

The record derives from TICA which reports it as a synonym (record CA64751A-6474-42D0-B41D-7A511025F9B6) with original publication details: Ohio J. Sci. 70: 232. 1970 232 1970.