Azolla pinnata R.Br.

Roots feathery in mature plants, sometimes simple in young specimens. Plants regularly pinnate. Massulae of the microsporangia conical, with rounded bases; 1–6 weak, non-barbed, non-septate processes borne only on one side. Megasporangia each with 9 apical swimming floats. Coast and adjacent plateaus; Cumberland Plain. Floating on slow-moving or stagnant water