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Oenothera speciosa is a herbaceous perennial wildflower.It has glabrous (smooth) to pubescent stems that grow to 50 centimetres (20 inches) in height. The pubescent leaves are alternate with very short or no petiole (sessile), reaching 10 cm (4 in) long to 4 cm (1 + 1 ⁄ 2 in) broad.
Many other less aggressive species are yellow or white and do not have pink coloring. Evening primrose grows in full sun and is hardy to USDA Hardiness Zones 4 to 9, which covers much of the country.
Oenothera rosea, also known as rosy evening-primrose, [1] rose evening primrose, [2] pink evening primrose, or Rose of Mexico, is a species of flowering plant in the family Onagraceae. It is native to the Americas but can also be found as an introduced species in several regions of the world.
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.
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)
The flowers of many species open in the evening, hence the name "evening primrose". They may open in under a minute. Most species have yellow flowers, but some have white, purple, pink, or red. Most native desert species are white. Oenothera caespitosa, a species of western North America, produces white flowers that turn pink with age. [5]