The Onagraceae are a family of flowering plants known as the willowherb family or evening primrose family. They include about 650 species of herbs, shrubs, and trees [4] in 17 genera. [5] The family is widespread, occurring on every continent from boreal to tropical regions.

Onagraceae, evening primrose family of flowering plants, belonging to the myrtle order (Myrtales), comprising 18 genera and 655 species, and concentrated in the temperate region of the New World.

A group of Onagraceae researchers worked together to gain a better understanding of the evolution of the family and to derive an appropriate classification. Using molecular, morphological, biochemical, and biogeographic tools, results have provided new insights into family relationships and monophyletic groups at the tribal and generic levels.

Identify plants and flowers of the Evening Primrose family (Onagraceae) with these wildflower identification tools and a photo gallery with plants grouped according to families.

The Onagraceae are a family of flowering plants known as the willowherb family or evening primrose family. They include about 650 species of herbs, shrubs, and trees in 17 genera. The family is widespread, occurring on every continent from boreal to tropical regions.

ONAGRACEAE P. Acevedo-Rodríguez A family of 22 genera and ~660 species of herbs or seldom shrubs, trees or scrambling vines. Although cosmopolitan in distribution, many genera are centered in temperate areas or in cool, high elevation areas of the Neotropics. Vines in the Neotropics belong exclusively to the

The Onagraceae consist of terrestrial or aquatic herbs and shrubs, rarely trees. The stems have internal phloem, often with epidermal oil cells. The leaves are spiral, opposite, or whorled, simple, undivided to pinnatifid, and exstipulate or stipulate.

The Onagraceae family is comprised of 18 genera, 655 species (803 taxa). Get a list of genera with nomenclature information. For taxa lists, click on a name in the cladogram to the right or use the query form below.

Onagraceae are known in considerable systematic detail, and information is available on comparative breeding systems and pollination biology, on chromosome numbers and cytogenetic relations, often involving translocations, and on vegetative, floral, and seed anatomy, palynology, and embryology.

The 22 genera of Onagraceae with publication and type information are listed below. Click the genus link for a list of its taxa divided by sectional names. Return to the previous page .