Ludwigia L.
Sepals persisting on to fruiting stage. Petals yellow. Aquatics or swamp plants Ludwigia
Erect shrubs, seeds free from fruit
Hairy shrub up to 3 m high, sometimes with pneumatophores. Leaves sessile or nearly so, ovate to lanceolate or elliptic, up to 12 cm long. Petals 10–25 mm long. Coast. Naturalized in swamps and lake margins. Introd. from America. Fl. spring–autumn Ludwigia peruviana
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