⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-105245, with some changes.
This name is a synonym of Silphium radula var. radula .
The record derives from TICA which reports it as a synonym (record 64595AA9-8ED8-4F60-BD1C-A530317FB137
) with original publication details: 125 1906.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:236471-2
.