The fern life cycle takes two generations of plant to procreate—known in scientific terms as diploid and haploid. I failed in my attempt to write the process succinctly. I would need to explain all sorts of things like rhizoids, archegonium, and apogamy; but trust me, it takes two generations. The two-generation system must work well because there are zillions of ferns growing everywhere. Nature continues to astound.
Here are some photos of a tiny fraction of the ferns I’ve seen on my hikes in the forest and include hay scented, cinnamon, christmas, interrupted, wood, hay scented (up close), bracken, sensitive, maidenhair, polypodies, braun's holly, new york, and lady fern