⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-23200536, with some changes.
This name is a synonym of Oenothera biennis f. argillicola .
The record derives from Tropicos which reports it as a synonym (record 23200536
) with original publication details: Torreya 4(4): 56-57 56 1904.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:172738-2
.