Oenothera mexicana Calflora... www.calflora.org

Cut-Leaf Evening-Primrose -... eol.org

Hairy cutleaf... www.inaturalist.org

NEON Biorepository Data... biorepo.neonscience.org

Oenothera L. | Plants of... powo.science.kew.org

Vascular Plants of the Gila... wnmu.edu

Oenothera (Oenothera) – A... www.atozflowers.com

Hairy cutleaf... www.inaturalist.org

Oenothera L. | Plants of... powo.science.kew.org

2013 BONAP North American... bonap.net

PlantFiles: The Largest... davesgarden.com

Oenothera speciosa 'Rosea'... www.shootgardening.com

Oenothera (Oenothera) – A... www.atozflowers.com

NEON Biorepository Data... biorepo.neonscience.org

Oenothera (Oenothera) – A... www.atozflowers.com

oenothera-rosea-a-native-pl... www.alamy.com

Oenothera L. | Plants of... powo.science.kew.org

CCH2 Portal - Oenothera www.cch2.org

Oenothera speciosa 'Rosea'... www.shootgardening.com

2013 BONAP North American... bonap.net