Ringworm shrub, also known as shrubby ringworm fern or Athyrium filix-femina, is a perennial plant species that belongs to the family of Athyriaceae. This plant has several synonyms that are commonly used, including lady fern, wood fern, common fern, and ostrich fern. Its common names are derived from its filigree-shaped leaves that resemble ostrich feathers. The ringworm shrub is widely cultivated as an ornamental plant and is known for its ability to tolerate a wide range of growing conditions. It is also known for its medicinal properties and is used in traditional and alternative medicine to treat a variety of ailments, including infections, skin disorders, and fever.