the world belong to a group called filicopsida. This group
             also includes water ferns and water clovers. The leaves of a fern can sprout from
             a prostrate stem, or have upright stems upto 20 meters long. The leaves of ferns are
             divided up into several leaflets, this type of leaf is called compound. Some leaves
             have sporangia that are grouped into sori on their undersides. These sori have a
             launching device that can spread the seeds several meters away. Most fern
             gametophytes contain both the archegonia and antheridia, though the sperm do
             have to use flagella to get to and fertilize the egg. A sex attractant is secreted by
             ...