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The primrose moth (Schinia florida) is a common consumer of Oenothera biennis. The adults lay eggs on the flower, and the emerging caterpillars feed on the plant. Pink wing tips reveal Schinia florida in the flower of the evening primrose. Primrose moth, Schinia florida, on an evening primrose, petals have been removed to reveal the insect.
The main phytochemical in this evening primrose seed oil is gamma-linolenic acid. [21] There is no high-quality scientific evidence that O. biennis or evening primrose oil has any effect on human diseases or promotion of health, [21] [22] and specifically no evidence that it is effective to treat atopic dermatitis or cancer.
Oenothera fruticosa, the narrowleaf evening primrose [1] or narrow-leaved sundrops, is a species of flowering plant in the evening primrose family. It is native to much of eastern North America, [ 2 ] where it is found in a variety of open habitats, including dry woodlands, rock outcrops and moist savannas.
Oenothera stricta, the fragrant evening primrose (a name it shares with other members of its genus), is a species of flowering plant in the family Onagraceae. [2] It is native to the Desventurados Islands , Chile, and southern Argentina, and it has been introduced to many locations around the world. [ 1 ]
Borage seed oil, blackcurrant seed oil, and evening primrose oil all have a significant amount of gamma-Linolenic acid (GLA) (about 23%, 15–20% and 7–10%, respectively), and it is this that has drawn the interest of researchers. Açaí oil, from the fruit of several species of the Açaí palm (Euterpe) grown in the Amazon region. [54] [55]
Oenothera triloba, with common names stemless evening primrose and sessile evening primrose [1] is a flowering plant in the primrose family. It is native to North America, where it is primarily found in northern Mexico and in the south-central United States. [2] It is found in dry, open areas such as glades, prairies, and sometimes even lawns.