Primrose Willow
Ludwigia peruviana
Family: Onagraceae
Natural History
Flower of primrose willow
Photo credit: Larry Korhnak, University of Florida
Primrose willow, an attractive member of the evening primrose family (Onagraceae), is a coarse, woody shrub, with herbaceous upper stems. The plants may bear conspicuous, bright yellow flowers year-round and are often seen in shallow, wet ditches, or along drainage canals, primarily in central and south Florida, but extending into north Florida as well. In the northern parts of the plant's range, flowers generally bloom in the fall and stems may become winter-killed, during cold snaps.
Butterflies are attracted to the sweet nectar of the flowers, so this plant is popular for backyard butterfly gardens.
Primrose willow is scattered throughout the southeastern United States, from West Virginia south throughout Florida and west to Missouri, Illinois, and Indiana.