Marsilea L. >
Sporocarps with 1 or more usually 2 teeth. Stalks of the sporocarps very rarely branched. Leaflets of the terrestrial forms often very densely hirsute. Stalks shorter than the sporocarps
Sporocarps with 1–2 unequal teeth; the upper tooth truncate; the lower often undeveloped. Leaflets usually narrowly oblanceolate to oblanceolate0.1–1 cm long, 0.07–0.45 cm broad. Cumberland Plain. Low-lying land subject to inundation Marsilea costulifera