Oenothera is a genus of about 145 species of herbaceous flowering plants native to the Americas. 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.
Oenothera speciosa is a species of evening primrose known by several common names, including pinkladies, pink evening primrose, showy evening primrose, Mexican primrose, amapola, and buttercups.
Oenothera biennis, the common evening-primrose, 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. Evening primrose oil (EPO) is produced from the plant.
Oenothera fruticosa, the narrowleaf evening primrose or narrow-leaved sundrops, is a species of flowering plant in the evening primrose family.
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. It is normally night-blooming.
Oenothera elata is a species of Oenothera known by the common name Hooker's evening primrose or tall evening primrose. Subspecies include hookeri, hirsutissima, longisima, jamesii, villosa and elata. It is native to much of western and central North America. The plants are quite tall, especially the hookeri subspecies, native to California, which can reach about 1.8 meters height. The plants are found along roadsides, in moist meadows, or woodland, from sea level up to 9,000 ft (2,700 m) in elevation.
Oenothera suffrutescens is a species of flowering plant in the evening primrose family known as scarlet beeblossom and scarlet gaura.
Oenothera xenogaura, is a species of flowering plant in the evening primrose family known by the common names Drummond's beeblossom and scented gaura. It is native to Mexico and its range extends into Texas. It can be found in parts of the southern and southwestern United States where it is an introduced species and is a minor weed in some areas. This is a mat-forming perennial herb growing from rhizomes. Stems reach 10 or 12 centimeters in height can be plentiful and tightly clumped. Leaves are about one to nine centimeters long and linear to slightly oval-shaped. The stems and foliage are covered in hairs. The plant produces small spike inflorescences with centimeter-long sepals and smaller spoon-shaped petals which are white, fading to pink. The fruit is an erect, woody capsule about a centimeter long with a base shaped like a stalk with a bulge at the center.
Gaura sinuata is a species of flowering plant in the evening primrose family known by the common names wavyleaf beeblossom and Red River gaura. In 2007 the species, along with the genus Gaura was reclassified in the genus Oenothera. This species then becomes O. sinuosa in Oenothera Section Gaura.
Camissoniopsis micrantha is a species of flowering plant in the evening primrose family known by the common names miniature suncup or small evening primrose. This is a small, hairy annual herb producing a basal rosette of leaves. It is characterized by small yellow flowers with petals less than 5 millimeters long. The flowers dry to a reddish color as they close. This species is found in Arizona and California in the United States, along with Baja California in Mexico. It grows in sandy areas in a number of habitats, from beaches to inland slopes. It is the smallest member of the genus Camissoniopsis.
Oenothera deltoides subsp. howellii, the Antioch Dunes evening primrose, is an endangered subspecies of plant in the family Onagraceae, genus Oenothera, and species Oenothera deltoides.
Oenothera californica, known by the common name California evening primrose, is a species of flowering plant in the evening primrose family.
Oenothera glazioviana is a species of flowering plant in the evening primrose family known by the common names large-flowered evening-primrose and redsepal evening primrose. Oenothera lamarckiana was formerly believed to be a different species, but is now regarded as a synonym of Oe. glazioviana.
Oenothera laciniata is a species of flowering plant in the evening primrose family known by the common name cutleaf evening primrose. It is native to the eastern United States but it can be found in many other places as an introduced species and sometimes a noxious weed. It is reported from Hawaii, Australia, Britain, France, Korea, Japan, and other areas. This is an annual or short-lived perennial herb producing a spreading stem from a hairy rosette of deeply cut or lobed leaves. Flowers occur in the axils of leaves higher on the stem. Each flower has pale to deep yellow petals up to about 2 centimeters long which fade orange, pink, or red with age. The fruit is a cylindrical capsule up to 5 centimeters in length.
Oenothera longissima is a species of flowering plant in the evening primrose family known by the common name longstem evening primrose. It is native to the southwestern United States, where it grows in relatively moist areas in scrub and woodland habitat. This is a biennial herb producing a tall, erect stem known to well exceed 2 meters in height. The widely lance-shaped leaves may be 22 centimeters in length and may have slight teeth along the edges. The inflorescence is a spike of showy large flowers. Each has yellow petals which may be more than 6 centimeters in length and fade orange or red with age. The fruit is a lance-shaped capsule up to 5.5 centimeters long.
Oenothera primiveris is a species of flowering plant in the evening primrose family known by the common names yellow desert evening primrose, bottle evening-primrose, and desert evening-primrose.
Oenothera xylocarpa is a species of flowering plant in the evening primrose family known by the common name woodyfruit evening primrose. It is native to the Sierra Nevada of California, its range extending just into western Nevada. It grows in coniferous forest and meadow habitat, often in soils rich in pumice and other gravel. It is a perennial herb growing from a thick taproot and producing a flat, dense rosette of hairy, gray-green leaves. There is no stem. The showy flowers appear amidst the leaves. Each has four petals which may be nearly 4 centimeters long, bright yellow in color, fading pink to red with age. The fruit is a straight, curving, or twisting capsule which may be up to 9 centimeters long.
Oenothera macrocarpa, the bigfruit evening primrose, Ozark sundrop or Missouri evening primrose, is a species of flowering plant in the evening primrose family Onagraceae, native to Mexico and the south-central United States, where it is found in calcareous prairies and limestone outcrops.
Phacelia argillacea is a rare species of flowering plant in the borage family known by the common names clay phacelia and Atwood's phacelia. It is endemic to Utah in the United States, where it is known only from one canyon in Utah County. It is "one of Utah's most endangered species"; it is "one of the nation's rarest plants" and is federally listed as an endangered species of the United States.
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.
