⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-14644, 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 4AE5E9D6-157D-4A1F-A737-1B2A3E3E0D30
) with original publication details: Rhodora 39: 288. 1937 288 1937.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:236474-2
.