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2. Oenothera biennis - Wikipedia

   en.wikipedia.org/wiki/Oenothera_biennis

   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 ...

3. Oenothera albicaulis - Wikipedia

   en.wikipedia.org/wiki/Oenothera_albicaulis

   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 .

4. Oenothera triloba - Wikipedia

   en.wikipedia.org/wiki/Oenothera_triloba

   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.

5. Oenothera fruticosa - Wikipedia

   en.wikipedia.org/wiki/Oenothera_fruticosa

   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.

6. Oenothera versicolor - Wikipedia

   en.wikipedia.org/wiki/Oenothera_versicolor

   Oenothera versicolor, the red evening-primrose, is a species of flowering plant in the family Onagraceae, native to South America, from Peru and Ecuador down to Bolivia and Northern Argentina [2] This species is not as common in cultivation as other members of the genus but popular cultivars including 'Sunset Boulevard' are grown in gardens around the temperate world as the plant is hardy down ...

7. Oenothera caespitosa - Wikipedia

   en.wikipedia.org/wiki/Oenothera_caespitosa

   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]