Sadleria cyatheoides, commonly known as Amaumau Fern, is an evergreen fern native to the volcanic slopes and cloud forests of the Hawaiian Islands. It typically grows to a height and width of 3-5 feet (0.9-1.5 meters), forming a dense, clumping habit. The Amaumau Fern is characterized by its upright, light green fronds that can add a lush, tropical feel to any garden setting. It does not produce flowers, but its fronds are highly ornamental and provide year-round interest.

The Amaumau Fern is valued for its ability to thrive in challenging environments, such as the acidic soils found near volcanic areas. It is often used in shaded garden areas, as ground cover, or in naturalized plantings where it can create a fern understory. This fern prefers consistently moist conditions and does not tolerate drought well. It is best grown in part shade to full shade and requires soil with good organic content and medium drainage. While it is generally free of serious pests and diseases, it can suffer from root rot if overwatered or planted in poorly drained soils.CC BY-SA 4.0