This formidable tropical palm is the Macaw Palm, Acrocomia aculeata. It is also known as Gru-Gru Palm, Grugru Palm, Coyol and Macaúba. It belongs to the palm family, Arecaceae, and is native across a broad area of tropical America, including parts of the Caribbean, Mexico, Central America and South America.

The palm develops a single upright trunk topped by a crown of long, arching, feather-shaped leaves. Mature specimens may become quite tall and form an open, somewhat irregular crown.

Its most obvious identifying feature is the abundance of sharp, dark spines. The trunk is often heavily armed, particularly when young, and spines may also occur on the leaf stalks and among the leaflets. Even fallen leaves can remain dangerously sharp, so this is definitely a palm to admire without touching.

The species name aculeata means prickly or armed, referring to those formidable spines. They may help protect the palm’s growing tissues and fruit from climbing animals.

The leaves are pinnate, meaning that numerous narrow leaflets are arranged along both sides of a central stalk. The leaflets may grow in slightly irregular groups and at different angles, giving the crown a full but somewhat untidy appearance.

The flowers are produced on large branching stalks among the leaves. Male and female flowers occur within the same inflorescence. The individual blossoms are small, but they attract insects that assist with pollination.

After flowering, the palm produces heavy hanging clusters of rounded fruits. They begin green and mature to yellow, orange or brown. Beneath the firm outer skin is a fibrous, oily layer surrounding an extremely hard stone.

The pulp and kernel are rich in oil. In different parts of tropical America, the fruits have been used for food, animal feed, beverages, soap and oil production. The hard inner stones may also be used for fuel or small craft items.

The fruit is especially important to wildlife. Macaws, parrots and other animals are able to break or work through the hard covering to reach the nutritious material inside. That association with large parrots probably helped inspire the common name Macaw Palm.

The palm is well adapted to heat, strong sunlight and seasonal drought. It can grow in open woodland, savanna, pasture and disturbed ground, where its spiny trunk protects it from many grazing animals.

Macaw Palm is therefore a plant of strong defenses and valuable rewards. Its trunk and leaves are protected by fierce spines, while its fruit offers rich pulp, oil and seed kernels to animals—and, where carefully processed, to people.

When standing beside it, the first thing to point out is the armor. Few palms display their defenses as openly as the Macaw Palm.