Onagraceae >
Stamens twice as many as the petals Onagraceae
Sepals persisting on to fruiting stage. Petals yellow. Aquatics or swamp plants Ludwigia
Erect shrubs, seeds free from fruit
Glabrous shrub to 3 m high. Stems 4-angled. Leaves linear to oblanceolate usually more than 12 cm long. Petals 20–25 mm long. Garden escape. Introd. from S. America. Fl. summer–winter. Ludwigia longifolia