Ceiba pentandra, commonly known as the kapok tree, ceiba, or silk-cotton tree, is a majestic tropical emergent tree belonging to the mallow family, Malvaceae. Native to the tropical regions of Mesoamerica, the Caribbean, northern South America, and West Africa, it has also been widely naturalized across Southeast Asia. The genus name Ceiba derives from the Taíno word for giant trees, while the species epithet pentandra is Greek for "five stamens," referencing its flower morphology. Historically, Ceiba pentandra held profound spiritual significance for ancient Maya civilization, where it was revered as the Yaxche—the sacred "World Tree" connecting the subterranean underworld, the earthly realm, and the heavens.

The plant is one of the largest trees in the Neotropics, capable of reaching towering heights of up to 60 to 70 meters with massive trunks exceeding 3 meters in diameter. It is famous for its colossal, plank-like buttress roots that spread outward to anchor the heavy trunk in thin tropical soils, and young trunks are often covered in sharp, conical prickles. The umbrella-shaped canopy bears palmately compound leaves with 5 to 9 leaflets. Ceiba pentandra blooms at night with creamy white or pale pink flowers that emit a musky aroma to attract bat pollinators. These blossoms are followed by large, woody, ellipsoid seed pods. Upon ripening, the pods split open to reveal dense, fluffy masses of yellowish-white silky fibers surrounding hundreds of dark brown seeds. The tree prospers in lowland tropical rainforests, riverbanks, and secondary disturbed woods with high humidity and well-draining soils.

As a functional and food source, the kapok tree yields both technical materials and dietary ingredients. The lightweight, buoyant, and hydrophobic seed hair fibers—known commercially as kapok fiber—were historically used worldwide as natural insulation, soundproofing, and fill for life preservers, mattresses, and pillows before synthetic synthetics dominated the market. Culinarilly, the oil pressed from the seeds is edible after refining and resembles cottonseed oil in culinary profiles. Young seed pods, tender leaves, and germinated seeds are consumed as emergency or seasonal vegetables in parts of West Africa and Southeast Asia. The roasted seeds can also be ground into a savory meal or used as a thickening agent for soups.

In traditional medicine across Latin America, West Africa, and South Asia, decoctions of the bark, leaves, and roots have been utilized to treat fever, asthma, dysentery, and inflammation due to their astringent and emollient qualities. Modern phytochemical analyses show that various parts of Ceiba pentandra are packed with bioactives, including flavonoids, isoflavones, tannins, and triterpenes, which demonstrate notable antioxidant, antimicrobial, and hypoglycemic activities in laboratory assessments.