Ludwigia L. >

Sepals persisting on to fruiting stage. Petals yellow. Aquatics or swamp plants Ludwigia
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Erect shrubs, seeds free from fruit
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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