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Oenothera is a genus of about 145 [3] species of herbaceous flowering plants native to the Americas. [4] It is the type genus of the family Onagraceae. Common names include evening primrose, suncups, and sundrops. They are not closely related to the true primroses (genus Primula).
Oenothera drummondii, the beach evening-primrose, is a species of flowering plant in the family Onagraceae. [2] It is native to Mexico and the southeastern United States, and it has been introduced to many locations around the world. [1] It is found on coastal dunes and other disturbed sandy areas at elevations below 400 m (1,300 ft). [3]
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 seeds are tiny, about 0.3 ...
Oenothera pallida, the pale evening-primrose, is a species of flowering plant in the family Onagraceae. [2] It is native to British Columbia, the western United States, and northern Mexico. [ 1 ] Flowers start out white and fade to pink.
Oenothera rhombipetala, the four-point evening-primrose, greater four-point evening-primrose, or diamond petal primrose, is a species of flowering plant in the family Onagraceae. [2] It is native to the central United States. [1] A biennial, it is often found alongside roads. [2] It can grow up to 5 feet (1.5 metres) tall. [2]
Oenothera triloba, with common names stemless evening primrose and sessile evening primrose [1] is a flowering plant in the primrose family. It is native to North America, where it is primarily found in northern Mexico and in the south-central United States. [2] It is found in dry, open areas such as glades, prairies, and sometimes even lawns.
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 albicaulis is a New World plant in the evening primrose family. It is known by the common names prairie evening-primrose , [ 2 ] white-stem evening-primrose , [ 1 ] whitish evening primrose , [ 3 ] or whitest evening primrose .