⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-23201067, with some changes.

Oenothera contorta Douglas ex Hook. is a synonym of Oenothera cheiranthifolia var. contorta (Douglas ex Hook.) H. Lév.

This name is a synonym of Oenothera cheiranthifolia var. contorta (Douglas ex Hook.) H. Lév..

The record derives from Tropicos which reports it as a synonym (record 23201067) with original publication details: Fl. Bor.-Amer. 1: 214 214 1833.