Osmunda regalis, commonly known as the royal fern, is a large, perennial fern native to temperate regions of the Northern Hemisphere. It typically grows in moist, shaded areas such as wetlands, riverbanks, and forests. The plant features feathery, arching fronds that can reach up to 2 meters in length, making it one of the tallest ferns. This fern is notable for its distinctive reproductive structures, called sporangia, which are found on specialized fronds. Osmunda regalis plays an important role in its ecosystem by providing habitat and food for various wildlife species. It is also used in traditional medicine and ornamental gardening.