evening primrose

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Related to Oenothera: Oenothera fruticosa, Oenothera macrocarpa, Oenothera lamarckiana

evening primrose

n.
Any of various plants of the family Onagraceae and especially the genus Oenothera of the Americas, having four-petaled usually yellow flowers that open in the evening and whose seeds yield an oil used in herbal medicine.

evening primrose

Herbal medicine
A biennial herb that contains essential fatty acids, including gamma linoleic acid; it is has been widely used for heart disease, hypercholesterolaemia, premenstrual syndrome, endometriosis, breast pain, menopause, eczema, psoriasis, acne, osteoporosis, multiple sclerosis, cancer, Alzheimer's disease, asthma, diabetes, hyperactivity and gastrointestinal disorders.

There are no peer-reviewed studies to support the efficacy of evening primrose.

Toxic effects
Headaches, nausea, seizures, skin rashes.
References in periodicals archive ?
New constituents from the roots of Oenothera biennis and their free radical scavenging and ferric reducing activity.
The study of features of the distribution and invasions of species of the Oenothera (subsect.
P39790 Ludwigia polycarpa Short & Peter: P39789 Oenothera laciniata Hill: P42142 Oenothera pilosella Raf.
Four-winged fruits are characteristic of Pedaliaceae, Melianthus, Oenothera, Petersianthus, Hymenopyramis, several apiaceous genera, and some Combretaceae.
Species ranking 2 through 5 in importance varied among seasons, but Uniola paniculata (sea oats), Oenothera drummondii (beach evening primrose), and Chamaecrista fasciculata (partridge pea) were among the top five species in importance in each season.
INCI name: Oenothera Biennis (evening primrose) seed extract Suggested use levels: 2-3%
Oenothera rosea methanol extract, Sphaeralcea angustifolia chloroform extract, Acacia farnesiana, Larrea tridentata and Rubus coriifolius methanol extracts as well as the aqueous extract of Chamaedora tepejilote were demonstrated to be particularly active against the induced hind-paw edema.
90 Barboukh (L), Creaking Board (Hollywood Starlet S-Gr1), Oenothera (L)
IF YOU want to grow an evening primrose, but fancy something smaller and more demure than the one most people grown, then try Oenothera speciosa Rosea.
Effects of arbuscular mycorrhizae on the establishment of the alien plant Oenothera laciniata (Onagraceae) on a Japanese coastal sand dune.
INCI name: Oenothera biennis (evening primrose) seed extract Use levels: 2-3% Applications: Sun and after-sun products, daily skin care Comments: Aqueous extract of evening primrose seed contains six polyphenols having anti-aging (collagenase and elastase inhibition) and antioxidant functionality.