Lythrum is a genus of flowering plants commonly known as loosestrife. These plants are typically found in wetlands and along the edges of rivers and lakes. They are characterized by their tall spikes of vibrant flowers, which can be purple, pink, or white. Lythrum salicaria, or purple loosestrife, is the most well-known species and is often used in gardens for its ornamental value. While Lythrum plants are attractive, some species, particularly Lythrum salicaria, can become invasive in certain regions. They can outcompete native plants, disrupting local ecosystems. Efforts are often made to control their spread to protect biodiversity in affected areas.