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Basal foliage of the Large-flowered Evening Primrose (Oenothera glazioviana), a 15-2m tall summer-flowering biennial originally native to northwestern Europe but now widely naturalised through most of the temperate to subtropical zones. It prefers to grow in gravelly soils, such as riverbeds and has naturalised in many areas, especially in gravelly soils, such as the riverbeds of the eastern South Island of New Zealand, where this image was taken. oenothera-3186htm'>Oenothera. Onagraceae.