柳叶菜科（Onagraceae），一年生挺水植物，高约10至两公尺以上。茎通常有棱，在叶子方面则呈现互生，花单生、果通常为椭圆。一般来说，该种植物都生长在季节性湿地，水田沟渠。

Several other genera are synonymized in the classification presented above, but commonly appear in the literature. Synonymized genera include:

The Onagraceae are a family, known as the willowherb family or evening primrose family, of flowering plants. 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.