Many of the plants in phylum polypodiophyta are ferns. Each group of fern plants consisting of spores or sporangia is called sorus. Fern are primitive plants and have an ancient history.
Many ferns are known since the time of fossil fuels. Other kinds of ferns are grape ferns and adder's tongue ferns. These ferns belong to the order Ophioglossales.
All of the ferns genera have complex and old histories. These plants are mostly found in wet and moist places and live in lakes and ponds where water is abundant.
