⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-23201657, with some changes.

Kneiffia perennis (L.) Pennell is a synonym of Oenothera perennis L.

This name is a synonym of Oenothera perennis L..

The record derives from Tropicos which reports it as a synonym (record 23201657) with original publication details: Bull. Torrey Bot. Club 46: 372 372 1919.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:133497-2.