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Oenothera harringtonii is a species of flowering plant in the evening primrose family known by the common names Arkansas Valley evening primrose and Colorado Springs evening primrose. It is endemic to the state of Colorado in the United States. [1] It is named for the botanist Harold Harrington. [2]
Because the evening primrose is a light-dependent germinator, it is important that the seeds are not planted too deep into the soil, about 0.5–1.0 centimetre (0.2–0.4 in) deep. The cultivation of evening primrose is thus suitable for no-till farming , but the plants require an intense mechanical weed control.
The roots of O. biennis are reportedly edible in young plants. So are the flowers which have a sweet, crunchy taste. [20] The common evening primrose, O. biennis, is commonly sold as a dietary supplement in capsules containing the seed oil. [21] The main phytochemical in this evening primrose seed oil is gamma-linolenic acid. [21]
Oenothera glazioviana is a species of flowering plant in the evening primrose family known by the common names large-flowered evening-primrose [1] and redsepal evening primrose. [2] Oenothera lamarckiana was formerly believed to be a different species, but is now regarded as a synonym of Oe. glazioviana .
Oenothera flava, the yellow evening primrose (a name it shares with Oenothera serrulata), is a species of flowering plant in the family Onagraceae. [2] It is native to western Canada (except British Columbia), the western and central United States, and Mexico (except southeastern Mexico), and it has been introduced to the former Czechoslovakia. [1]
Oenothera glazioviana Micheli – red-sepal evening primrose (North America) [67] Oenothera grandiflora L'Hér. – large-flower evening primrose (eastern North America) Oenothera jamesii Torr. & A.Gray – trumpet evening primrose (Mexico, KS, OK, TX) [68] Oenothera longissima Rydb. – long-stem evening primrose (southwestern North America)
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