Sporangia scattered over the lower surface of the lamina, or 2-3(-4) fused into synangia in the axils of 2-lobed scale-like or leaf-like appendages, or rarely in terminal strobili, then the sporangia hanging from a peltate structure. Monilophyta
Plants growing in soil, mud or epiphytic
Whole plants floating with the roots or root-like submerged leaves suspended in the water