Tree ferns are a type of fern that have a trunk-like stem and large, feathery fronds. The scientific name for tree ferns is Cyatheaceae, which is derived from the Greek words kyatheion, meaning cup, and kyatheion, meaning fern. Tree ferns are native to tropical and subtropical regions of the world, and they are often used as ornamental plants in gardens. They are also an important source of food for many animals, including birds, bats, and lizards.