Bixa is a small genus of flowering plants in the family Bixaceae, placed in the order Malvales. Native to Mexico, Central America, the Caribbean, and tropical South America, the genus comprises around six species of shrubs and small trees that thrive in warm, frost-free climates.
The genus is dominated in ecological and economic importance by its type species, Bixa orellana, commonly known as achiote or the lipstick tree. This perennial shrub or small tree grows 6–10 metres tall and produces clusters of bright white or pink flowers resembling single wild roses, followed by spiny, ovoid seed pods that dry to a reddish-brown. Each pod contains 30–45 seeds coated in a waxy blood-red aril — the source of annatto, one of the oldest and most widely used natural pigments in the world. The orange-red colour derives from carotenoid pigments, principally bixin (the red component) and norbixin (the yellow component).
Annatto has been used for millennia by indigenous peoples of the Americas as body paint, a spice, and a medicinal dye. From the 16th and 17th centuries onward, trade networks carried it to Southeast Asia, Africa, and the Caribbean, where it became established in the cuisines and food industries of many tropical regions. Today annatto is a commercial commodity used to colour butter, cheese, margarine, and processed foods; Peru and Brazil are the world's leading producers.
The other species in the genus — including Bixa atlantica (eastern Brazil), Bixa arborea, Bixa excelsa, Bixa platycarpa, and Bixa urucurana — have more restricted distributions across South America. The genus name derives from the aboriginal Taíno word "bixa", reflecting the plant's long history among the peoples of the Caribbean and tropical Americas.
Etymology
The genus name Bixa is derived from the aboriginal Taíno word "bixa," reflecting the plant's deep cultural roots in the Caribbean. The most important species, Bixa orellana, was named by Linnaeus in honor of the Spanish conquistador and Amazon explorer Francisco de Orellana. Common names across cultures include achiote (from Nahuatl āchiotl), annatto, roucou, bija, and urucum — the Tupi word meaning "red color," which also refers to the body paint prepared from its seeds.
Distribution
Bixa is native to the neotropics, with its range spanning Mexico, Central America, the Caribbean, and tropical South America, particularly northern South America and the Amazon basin. Bixa orellana, the type species, has been widely cultivated and naturalized across tropical regions globally, including West Africa, India, Sri Lanka, the Philippines, Hawaii, and the Society Islands. Other species in the genus have more restricted ranges, such as Bixa atlantica (eastern Brazil) and Bixa excelsa (Peru and northwestern Brazil).
Cultural Uses
Bixa orellana is the source of annatto (also called achiote or bijol), obtained from the waxy red arils surrounding the seeds. It is a staple natural food colorant used in traditional dishes across Central and South America, Mexico, and the Caribbean — including cochinita pibil and nacatamal — and commercially to color butter, cheese, margarine, ice cream, and processed meats. Indigenous peoples of the Americas historically used the seeds to prepare red body paint and cosmetic lipstick, a use that earned the plant its English nickname "lipstick tree."
Cultivation
Bixa orellana is cultivated commercially throughout the tropics and subtropics. It grows readily in frost-free conditions with good drainage, year-round moisture, and full sun to partial shade in moderately fertile soil. Propagation is by seed or cuttings, with cutting-grown plants reaching flowering age sooner than seedlings. The leading commercial producers are Peru (the largest exporter), Brazil (the largest producer at roughly 5,000 tonnes per year), and Mexico, together accounting for about 60% of global output; Africa (mainly Kenya, Côte d'Ivoire, and Angola) and Asia supply most of the remainder.
History
Annatto from Bixa orellana has been used by Amazonian and Caribbean peoples for thousands of years as pigment, spice, and medicine. European contact in the 16th century introduced it to global trade networks: during the 16th and 17th centuries the dye was carried to Southeast Asia, Africa, the Caribbean, Hawaii, and southeastern North America. It became firmly established in Indian, Sri Lankan, and Javanese agriculture and food culture primarily for its pigment, and is now a widely traded commodity with an estimated annual world production of around 10,000 tonnes of dried seed.
