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Pictured are capsules of evening primrose, <i>oenothera biennis</i>. The capsules are an inch long and loosely arranged on the lower part of the flower spikes.

Evening Primrose Capsules

Pictured are capsules of evening primrose, oenothera biennis. The capsules are an inch long and loosely…

The common name of oenthera is evening primrose. The acaulis variety has white flowers fading into red. The flowers bloom May to September. The plant grows six inches high.

Habit and Detached Leaf and Flower of Oenothera Acaulis

The common name of oenthera is evening primrose. The acaulis variety has white flowers fading into red.…

Pictured are the albicaulis and californica varieties of evening primrose. Albicaulis has white flowers while californica has flowers varying from white to pale pink.

Oenothera Albicaulis and Oenothera Californica

Pictured are the albicaulis and californica varieties of evening primrose. Albicaulis has white flowers…

Oenothera amoena rubicunda is a variety of evening primrose with rose flowers with four crimson spots. The flowers bloom in summer.

Flowering Branch of Oenothera Amoena Rubicunda

Oenothera amoena rubicunda is a variety of evening primrose with rose flowers with four crimson spots.…

The common name of oenothera biennis is common evening primrose. The lamarckiana variety has larger and finer flowers.

Oenothera Biennis Lamarckiana

The common name of oenothera biennis is common evening primrose. The lamarckiana variety has larger…

Oenothera exima is a variety of evening primrose with white flowers that are four inches in diameter. The flowers bloom in July.

Oenothera Exima

Oenothera exima is a variety of evening primrose with white flowers that are four inches in diameter.…

Oenthera Lady Albemarle has distinct, showy crimson flowers. It is a dwarf variety.

Oenothera Lady Albemarle

Oenthera Lady Albemarle has distinct, showy crimson flowers. It is a dwarf variety.

Oenothera missouriensis latifolia flowers are large and yellow. The leaves are broad.

Oenothera Missouriensis Latifolia

Oenothera missouriensis latifolia flowers are large and yellow. The leaves are broad.

Oenothera speciosa is a variety of evening primrose with white flowers that become reddish as they fade. The flowers bloom March to September.

Flowering Branch of Oenothera Speciosa

Oenothera speciosa is a variety of evening primrose with white flowers that become reddish as they fade.…

Pictured are flowers from the orders onagraceae and haloragidaceae. The flowers of these orders that are illustrated are (1) oenothera, (2) epilobium, (3) circaea, and (4) myriophyllum.

Orders of Onagraceae and Haloragidaceae

Pictured are flowers from the orders onagraceae and haloragidaceae. The flowers of these orders that…

Sundrops is the common name of <i>oenothera linearis</i>. The flowers are colored a bright, clear yellow. The flowers bloom in July.

Sundrops

Sundrops is the common name of oenothera linearis. The flowers are colored a bright, clear yellow. The…

Sundrops is the common name of <i>oenothera pratensis</i>. The flowers are bright yellow and grow clustered at the end of the stems. The flower can be found from Maine to Iowa and Arkansas.

Sundrops

Sundrops is the common name of oenothera pratensis. The flowers are bright yellow and grow clustered…