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Plant Form: Emergent aquatic perennial.
Size: Up to 1.5 m tall.
Stem: Slender, loosely branched long flower stalks.
Leaves: Bright green, hairless, lance shaped, up to 25 cm long.
Flowers: Tiny pinkish, stalked, in groups of 2-5, 3 petals, almost circular.
Fruit and Seeds: 10-20 per flower with 1 seed each, flattened with short beak.
Habitat: Shallow water, drains, riverbanks, creeks.
Distinguishing Features: Narrower leaves than native Common water plantain (Alisma plantago-aquatica), and leaves tapering to stalk.