Marsilea (Waterclover) is a genus of herb in the family Marsileaceae. They are associated with freshwater habitat. They have pinnate leaves. They have alternation of generations.
Definition: A wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions.
Definition: The important feature of homospory is the four fold division involved in spore production, this takes the form of either a tetrahedra which gives a trilete (Y shaped scar) spore or a tetragon which gives a monolete (single linear scar) spore.
