Adders fern is a common name used to refer to a type of fern plant known scientifically as Ophioglossum vulgatum. This plant is named "adders fern" because of its resemblance to the head of a snake, which is a symbol of the Greek god of healing.
There are several other synonyms for adders fern, including snake's-tongue fern, serpentary fern, and long-tipped adder's tongue. The plant is typically found in wetlands and damp areas, and it can be identified by its long, thin leaves that resemble the tongue of a snake.
Other synonyms for adders fern can also include serpent fern, viper's-tongue fern, and dragon's-tongue fern. Regardless of the name used to describe the plant, adders fern is valued for its medicinal properties and is commonly used in traditional medicine practices to treat a range of ailments.