This tree-like fern is not actually a tree. Rather it is a fern that grows to resemble a tree. It's trunk is formed by fern leaves that have fallen off. But the trunk itself is not actually alive. It is dead material that supports the vascular root system which connects the leaves to the ground.

The trunk nearest the ground is smooth due to a covering of moss.

The trunk just below the leaves is rough with the remains of leaves that have fallen off as part of the plant's growth.

As with most ferns, the leaf is formed from a single stem. Because the leaf has a strong stem running its length, the leaves can grow to nine feet (3 m) in length in a mature plant.

Because these leaves are arranged in layers, it is important that light be allowed to pass from the top layer to lower layers. The design of these leaves allows light to pass through.

A detail shot of the leaves.

The plant grows by sprouting new leaves a the top and dropping off old leaves from the bottom. The leaves at the bottom that will drop off have a decidedly less healthy look.

Looking up underneath the top leaves it is clear that a great deal of light can pass through to lower leaves.

The leaves grow by unfurling (unrolling) from the tips. New leaves grow straight up and slowly bend as they gain weight during their unfurling growth.

When seen from afar, it is easy to mistake this fern for a tree. With proper growing conditions, these ferns can make a handsome addition to any garden. Just beware they can grow to 20 feet (6 m) in height and can live 100 years.

Here is an example of an unhealthy specimen. Damage may have been caused by the encroaching shade of other nearby taller plants.