Plants ovate in outline, branching irregularly; roots simple. Leaves triangular; apex rounded; margins membranous and translucent; surface smooth, bright red or green. Microsporangiate massulae spherical, prominently barbed on all surfaces. Megasporocarps brown, partially obscured by leaf lobe. Megasporangia each with 3 apical swimming floats. Microsporocarps are pale yellow and very obvious on the undersides of plants, but the dark brown megasporocarps are usually obscured by the lower leaf lobe.
Found on ponds, lakes, dams or still or slow moving water (e.g. sluggish backwaters of streams); occasionally grows near water seepages.
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