Taxonomy
- Kingdom: Plantae
- Clade: Tracheophytes → Angiosperms → Eudicots → Rosids → Order Morales (Moraceae)
- Family: Moraceae
- Genus: Brosimum
- Species: B. alicastrum
- Authority: (Miller) Standl.
Common names
Breadnut, Maya nut, ramon, “castilla” (in some Spanish‑speaking regions).
Description
Brosimum alicastrum is a medium‑to‑large evergreen tree reaching heights of 20–30 m and a trunk diameter of up to 1 m. The bark is grayish‑brown and often exhibits shallow fissures. Leaves are alternate, simple, palmately veined, and measure 15–30 cm in length; they are glossy green on the adaxial surface and paler beneath. The species produces milky latex when bark or petioles are incised, a characteristic trait of many Moraceae members.
Inflorescences are axillary or terminal panicles bearing small, unisexual flowers; the species is monoecious, bearing both male and female flowers on the same individual. The fruit is a large, spherical drupe, 5–10 cm in diameter, with a thick, woody pericarp encasing a starchy, edible seed (often referred to as a “breadnut”). The seed is oval, 2–3 cm long, and contains a substantial endosperm rich in carbohydrates and protein.
Distribution and habitat
Native to the Neotropics, B. alicastrum occurs from southern Mexico through Belize, Guatemala, Honduras, Nicaragua, Costa Rica, and Panama, extending into the Caribbean islands (Cuba, Hispaniola, Jamaica) and northern South America, including Colombia, Venezuela, Ecuador, Peru, and Brazil. It typically grows in lowland tropical rainforests, secondary growth, and disturbed sites, from sea level up to approximately 1,200 m elevation. The species tolerates a range of soil types but prefers well‑drained, fertile soils.
Ecology
The tree contributes to forest structure by providing canopy cover and habitat for epiphytic plants and fauna. Its fruits are consumed by a variety of birds, mammals (including bats and agoutis), which act as seed dispersers. The milky latex deters many herbivores, though some specialized insects feed on leaves and flowers.
Uses
Food: The seeds are traditionally roasted, boiled, or ground into flour to make breads, tortillas, and porridges. The seed’s nutritional profile includes carbohydrates, dietary fiber, protein (approximately 10–12 % by weight), and essential minerals such as calcium, magnesium, and potassium.
Timber: The wood is dense, moderately hard, and resistant to decay, making it suitable for construction, furniture, and tool handles.
Traditional medicine: Various parts (bark, leaves, latex) have been employed in folk remedies for wound healing, gastrointestinal complaints, and as an anti‑inflammatory, though scientific validation is limited.
Cultural significance: In pre‑Columbian Mesoamerica, the tree was cultivated by the Maya and other indigenous groups as a staple carbohydrate source, particularly during periods of maize scarcity. Archaeobotanical evidence indicates long‑term domestication and management.
Conservation status
The International Union for Conservation of Nature (IUCN) lists Brosimum alicastrum as Least Concern, reflecting its wide distribution and occurrence in multiple habitat types, including anthropogenically altered areas. No major threats are documented, although local overharvesting for timber or land‑use change could affect isolated populations.
Propagation and cultivation
Seeds exhibit a dormancy period that can be broken by scarification or soaking in water. Germination occurs within 2–4 weeks under suitable moisture and temperature conditions (25–30 °C). The species is often propagated in agroforestry systems due to its shade tolerance and ability to improve soil fertility through leaf litter.
References
- Standley, P. C. (1929). Contributions from the United States National Herbarium.
- USDA Forest Service. (2020). Species Profile: Brosimum alicastrum.
- González, A., & Martínez, L. (2018). “Nutritional composition of breadnut (Brosimum alicastrum) seed flour.” Journal of Food Science, 83(4), 1021‑1028.
This entry summarizes current encyclopedic knowledge of the species Brosimum alicastrum as of the latest available scientific literature.