Doryopteris raddiana, commonly known as Delta Maidenhair, is a perennial fern native to the Atlantic Forest biome in South America. This delicate fern typically grows to a height and width of 1-2 feet (0.3-0.6 meters). It features triangular fronds and a unique leaf structure that resembles a delta, hence its common name. The fronds are light green and can add a fine texture to shaded garden areas. Delta Maidenhair does not produce showy flowers but is valued for its attractive foliage.

Delta Maidenhair is ideal for shaded rock gardens, woodland gardens, and as a ground cover in shady borders. It thrives in humid conditions with dappled light, mimicking its native understory habitat. The fern prefers consistently moist, well-draining soil rich in organic matter. While it requires medium amounts of water, it is important to avoid waterlogged conditions. Gardeners should be cautious when introducing this species outside its native range, as it has the potential to become invasive. It is recommended to consult local regulations and invasive species lists before planting.CC BY-SA 4.0