-Plants (Kingdom Plantae)

-Vascular Plants (Phylum Tracheophyta)

-Flowering Plants (Subphylum Angiospermae)

-Dicots (Class Magnoliopsida)

-Myrtles, Evening Primroses, and Allies (Order Myrtales)

-Evening Primrose Family (Family Onagraceae)

-Primrose-Willows (Genus Ludwigia)

-Ludwigia erecta

Ludwigia erecta, commonly known as the upright primrose-willow, is an annual herbaceous plant that typically grows as an erect, highly branched herb reaching heights between 1 and 3 metres. During its flowering season the plant produces solitary yellow flowers in the upper leaf axils, each featuring four petals and eight stamens. Primarily found in tropical and subtropical regions of the Americas, it thrives in wet environments such as marshes, swamps, and ditches, where its square, four-angled capsules eventually release numerous tiny seeds.