Common/Local Name(s): willow primrose or wingleaf primrose-willow
Family: Onagraceae
Botanical Description: Ludwigia decurrens is an erect annual or perennial herb that can grow up to 1.5 meters tall.
The stems are winged or have decurrent ridges, giving them a distinctive appearance.
The leaves are lance-shaped, arranged alternately along the stem, and can be up to 10 cm long.
The flowers are bright yellow with four petals, typically blooming from the upper leaf axils.
The fruit is a capsule containing numerous small seeds.
Flowering/Fruiting: Flowers from May to September.