Photo: Oenothera macrocarpa 5.

Flowering plant. Helsinki bot.g. (Kaisan.), Finland. Planted. 2006-08-31.
Oenothera macrocarpa Nutt. Engl.: bigfruit evening-primrose, Ozark sundrops. Deu.: Missouri-Nachtkerze. Suom.: isohelokki. Sven.: storblommigt nattljus. Bot. syn.: Oenothera fremontii S. Wats., Oenothera missouriensis Sims
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Photo: Oenothera macrocarpa 5.