Definition of "oenothera" [oenothera]

• Chiefly North American herbs with usually nocturnal flowers (noun)

WordNet. Princeton University. 2010.

• "Not true primroses, but a clear true yellow color, a fairy favorite, this oenothera, cultivar unknown, has flowers that stay open during the day, unlike some evening primroses."
• "Nyssa sylvatica oaks odd plants oenothera Missouriensis oil insecticides okra old-fashioned gardens"
• "Of such are adlumia, Canterbury bell, lunaria, ipomopsis, oenothera Lamarckiana; and foxglove, valerian, and some other perennials would better be treated as biennials."