Oleandra (Oleander Fern) is a genus of herb in the family crevice creepers. They are native to Puerto Rico. They have simple leaves. Individuals can grow to 3.5 m. They have alternation of generations.
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.