Hapu'u Pulu is a type of tree fern native to the Hawaiian Islands. It is known for its large, feathery fronds that can grow up to 10 feet long. This plant thrives in moist, shaded environments, often found in rainforests and along mountain slopes. The Hapu'u Pulu plays a crucial role in its ecosystem by providing habitat and food for various native species. Its ability to retain moisture helps maintain the humidity levels in its surroundings, making it an important plant for the health of Hawaiian forests.