Categories Wildflowers | yellow & orange flowers | Oenothera biennis Oenothera biennis Common name(s): Common Evening-Primrose, German-Rampion, Evening Star, Sun Drop Synonyme(s): N/A Family: Onagraceae Origin: Canada, USA, naturalized in Europe. More infos: USDA zone 4. Related plants:Circaea lutetiana Epilobium angustifolium Epilobium hirsutum Fuchsia hybrida Fuchsia magellanica Fuchsia magellanica var. arauco Fuchsia triphylla Oenothera “Lemon Drop” Oenothera macrocarpa Oenothera speciosa