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Oenothera biennis, the common evening-primrose, [3] is a species of flowering plant in the family Onagraceae, native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. [4]
Oenothera fruticosa is an evening primrose which stands in a height range of 16-36 inches and is a perennial wildflower. Leaves are alternating and lance-shaped, growing 2-3 inches and pubescent. The stem is straight, pubescent, and ranges in color from red-green. The petals are rounded and 1-2 inches long. Flowering is in spring to early summer.
Oenothera perennis is a species of flowering plant in the family Onagraceae and is native to the eastern United States and Canada. [1] [2] Its common names include little evening primrose, [3] small sundrops, [4] and small evening primrose. Its native habitats include shaly slopes, moist or dry fields, pastures and roadsides.
A number of perennial members of the genus are commonly cultivated and used in landscaping in the southwestern United States. Popular species include tufted evening primrose (Oenothera caespitosa), Mexican evening primrose (Oenothera berlanderii), and Saltillo evening primrose (Oenothera stubbei). [31]
Oenothera caespitosa at dusk, Convict Lake, Mono County CA. Oenothera caespitosa, known commonly as tufted evening primrose, desert evening primrose, rock-rose evening primrose, or fragrant evening primrose, is a perennial plant of the genus Oenothera native to much of western and central North America, in habitats such as talus slopes and sandy plains. [1]
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]
Oenothera nuttallii, the white-stemmed evening-primrose, is a species of flowering plant in the family Onagraceae. [2] It is native to western Canada (except British Columbia), and the north-central United States, and it has been introduced to Illinois. [ 1 ]
This plant is a well-defined diploid (2n = 14) species that has varying floral traits over its geographic distribution. [1] The specific epithet cheiranthifolia refers to the leaves having the appearance of Cheiranthus, an old name for a wallflower genus. [2] Beach evening primrose flowers. The two subspecies are: