Ruppia megacarpa R.Mason

Leaves truncate or emarginate, 5–15 cm long, 0.5–0.8 mm wide. Carpels 2–6 usually 4. Peduncle at flowering more than 15 cm long. Fruit brown-black, asymmetric, 3–4 mm long; fruit stalk often reflexed. Coast. Lagoons and estuaries in brackish to very salt water. Fl. spring–autumn