General characteristics of light-induced germination of Oenothera biennis L. seeds were investigated at 24°C. During dark imbibition, seeds reached maximal respiration in 7 hours and maximal water ...

This paper offers a body of evidence which shows that hybrids resembling Œnothera Labiatae may be synthesized from certain strains of the American native species O. biennis and O. grandiflora. The ...

Q: My son gave me a plant called evening primrose this past spring. He got it from a neighbor. It blooms yellow over about 6 weeks, but each flower only lasts one evening and then dies. Hummingbird ...

What Is Evening Primrose Oil? Evening primrose oil (EPO) comes from the seeds of a wildflower called Oenothera biennis. The seed oil is rich in fatty acids called linoleic acid (LA) and ...

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This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...

When planning a new garden, we typically think about the amount of sunlight which will be available to plants in a specific location at different times of the day, and perhaps how plants might look in ...