Lecythis is a genus of woody trees and shrubs in the family Lecythidaceae, order Ericales, native to Central America and South America. The genus was first described in 1758 and comprises around 44 species in GBIF, though its circumscription has been revised in light of recent molecular work.
The plants are best known for their large, woody, urn-shaped capsular fruits — sometimes called "monkey pots" — which open by a lid at the top when ripe. Inside each capsule, 8 to 40 large, oil-rich seeds are arranged around a central woody column. The fruit can reach 15 cm or more in length. Seeds of several species are edible and marketed under common names including paradise nut, monkey pot, cream nut, and sapucaia nut. The oil pressed from the seeds is clear and tasteless; in Brazil it has historically been used to manufacture white soap and as lamp fuel. The dense, durable wood is valued in construction, cabinetry, and for tool handles.
A 2024 phylogenetic study by Vargas et al. concluded that Lecythis as traditionally circumscribed is polyphyletic. The authors proposed retaining the core Ollaria clade as Lecythis sensu stricto while reassigning three additional clades: the Poiteau and Chartacea sections to a revived Chytroma, the Pisonis section to a reinstated Pachylecythis, and the Corrugata clade to the newly described genus Guaiania.
Etymology
The name Lecythis derives from the Greek lekythos (λήκυθος), meaning an oil-flask or urn — an allusion to the distinctive urn-shaped woody capsules that characterise the genus.
Distribution
Lecythis is native to Central America and South America, with species occurring across tropical lowland and montane forests from Panama and Venezuela south through the Guianas and Brazil.
Cultural Uses
Seeds of most Lecythis species are edible and are eaten raw, roasted, or boiled. L. zabucajo is considered the most prized edible species; L. ollaria and L. pisonis are also consumed. The oil extracted from the seeds is clear and tasteless; in Brazil it has been used to make white soap and burned as lamp fuel. The timber is hard and durable and is used locally in construction, cabinetry, and for making tool handles and other wooden items.
History
The genus was brought to wider botanical attention by Jean-Baptiste Christophore Fusée Aublet (1720–1778), the French botanist and apothecary who collected Lecythis zabucajo during his two-year residence in French Guiana and described it in his Histoire des Plantes de la Guyane Françoise (1775). Because of the high oil content of the seeds, living specimens were later introduced to Singapore as a candidate economic crop.
Taxonomy Notes
Lecythis was first established as a genus in 1758. A 2024 phylogenetic study (Vargas et al.) demonstrated that the genus as traditionally defined is polyphyletic. The study proposed retaining the core Ollaria clade in Lecythis and erecting or reviving three segregate genera: Chytroma (for the Poiteau and Chartacea sections), Pachylecythis (for the Pisonis section), and the new genus Guaiania (for the Corrugata clade). The genus belongs to family Lecythidaceae within order Ericales.
