This enormous tropical tree is the Kapok, Ceiba pentandra. It is also known as the Silk-Cotton Tree or simply the Ceiba. It belongs to the mallow family, Malvaceae, along with hibiscus, cotton, cacao and Baobab. Its native range extends from Mexico through the Caribbean and much of tropical Central and South America, although it has also been planted and naturalized widely in Africa and Asia.

Kapok is one of the giants of the tropical forest. A mature tree may rise well above the surrounding canopy, supported by a massive trunk that can develop broad, plank-like buttress roots.

Those buttresses spread outward from the base like walls or fins. They help stabilize the tall tree in shallow tropical soils and can become large enough for a person to stand between them.

Young trunks and branches may carry stout, conical prickles. These usually become less noticeable as the tree grows older and its trunk expands.

The leaves are compound and shaped somewhat like an open hand. Five to nine narrow leaflets spread outward from the end of a single stalk. The species name pentandra refers to the five stamens found within the flower.

Kapok may shed many of its leaves during the dry season. The flowers often appear while the branches are bare or nearly bare, making them easier for pollinators to find.

The flowers are pale cream, white or pinkish and usually open during the evening or night. They produce abundant nectar and are visited by bats, which carry pollen from one flower to another. Birds and insects may also visit them.

After pollination, the tree develops large, hanging capsules. These begin green and become brown as they mature.

When a ripe capsule splits open, it reveals numerous dark seeds surrounded by masses of soft, silky fiber. This pale material is the kapok that gives the tree its common name.

Kapok fiber is light, buoyant and naturally water-resistant. Before synthetic materials became common, it was widely used to fill mattresses, cushions, pillows and life jackets. Unlike cotton, however, its fibers are difficult to spin into thread.

The tree’s light wood has been used for canoes, carvings and other objects, while the seeds can yield oil. Kapok also provides nectar for pollinators and shelter for many forest animals. Kew records a wide range of environmental, social and practical uses for the species.

Ceiba trees have deep cultural and spiritual significance throughout the tropical Americas and Caribbean. In several traditions, their great height and spreading roots connect the heavens, the human world and the earth below.

The Kapok Tree is therefore impressive at every scale: from the small hand-shaped leaves and silky seeds to the immense trunk and buttress roots.

When standing beside a mature Kapok, the best thing to notice first is its architecture. The great trunk rises like a tower, while the roots spread outward like the foundations of a living cathedral.