Oenothera Albicaulis and Oenothera Californica
Pictured are the albicaulis and californica varieties of evening primrose. Albicaulis has white flowers while californica has flowers varying from white to pale pink.
v. 2 - Favourite flowers of garden and greenhouse - Biodiversity Heritage Library
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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. The flowers bloom May to September. The plant grows six inches high.