Adder's fern, scientifically known as Ophioglossum Vulgatum, is a plant that is widely found in the wild. It is known by different names depending on the region. In some places, it is referred to as the common adder's tongue, while in others, it goes by the names of serpent's tongue or hog's fiddle. Other synonyms for the plant include dragon's tail, snake leaf, and bishop's violet. Adder's fern has been historically known for its medicinal properties in treating conditions such as fever and cough. The fern is also used for ornamental purposes in gardens and landscape designs.