Ruppia L. >

Inflorescence always 2-flowered. Carpels 2–19. Mature fruit usually stalked Ruppia
consider the other alternative
Peduncle at fruiting stage not coiled or loosely coiled 1–2 times. Flowers submerged. Fruit black, 2–3 mm long, asymmetrical, with stalks c. 1 cm long. Leaves linear, up to 5 cm long, c. 0.5 mm wide, with an acute or obtuse tip. Coast. Estuaries in brackish to very salt water. Fl. spring–autumn Ruppia maritima