Photo: Oenothera 0.

Botanical name: 
Photo: Oenothera.

Flowering plant. There's yellow and white Oenothera species, and there's yellow and white Camissonia species. You can use the upright yellow Oenotheras like you'd use the "real" evening primrose, Oenothera biennis. The others won't work. Bow Willow, CA, US. Wild. 1998-03-01.

Oenothera L.
Engl.: evening primrose, sundrops.
Deu.: Nachtkerze.
Suom.: helokki.
Sven.: nattljus