The king fern, also known as the Australian sword fern or giant fern, is a majestic plant that can grow up to 6 feet tall. This fern is an evergreen perennial and thrives in moist, shaded locations. There are several synonyms for the king fern, including Nephrolepis biserrata, which is its scientific name. Other synonyms include the Sydney fern, Boston fern, and fishbone fern. The king fern is a popular choice for landscaping due to its size and striking appearance. It can be used as a focal point or to add depth and texture to a garden or indoor space.