The Prince-of-Wales fern, also known as the sword fern or Polystichum acrostichoides, is a popular plant for its unique foliage. This fern grows in a vase-like shape with long, arching fronds. It is a great addition to any garden or indoor plant collection. Other common synonyms for this fern include Christmas fern, holly fern, and shield fern. Christmas fern is named for its evergreen nature and is often used as a holiday decoration. Holly fern resembles the leaves of a holly plant and shield fern because of its sturdy fronds. Regardless of its name, all synonyms refer to the same beautiful fern that can bring life and color to any space.