Ludwigia L.

8 species in Aust. (4 native, 3 naturalized, 1 doubtful); all states and territories except Tas.

Herbs or shrubby, often aquatic perennials. Leaves alternate, usually entire, sessile or petiolate. Flowers solitary in the leaf axils. Petals 4–5, yellow. Stamens 4–10. Floral tube not extended above the ovary. Ovary 4–5-locular. Capsule terete. Seeds numerous.