Couratari is a genus of large trees in the Brazil nut family, Lecythidaceae, within the order Ericales. The genus was first described by Jean Baptiste Christophe Fusée Aublet in 1775, in his Histoire des Plantes de la Guiane Françoise. Roughly 19–21 species are currently recognized.
Trees in this genus are often emergent, rising above the surrounding rainforest canopy. The evergreen leaves are alternate, simple, and elliptical, growing up to 15 cm long with a serrate to serrulate margin. A distinctive feature is the presence of vernation lines running parallel to the leaf midvein, an unusual trait not commonly seen in other genera. The woody fruit is 6–15 cm long and roughly conical; at maturity a central plug drops out, releasing winged seeds that are dispersed by wind. Couratari fruit can be distinguished from those of the closely related genus Cariniana (also in Lecythidaceae) by the presence of a single calyx-derived ring near the fruit apex, whereas Cariniana fruit instead bear longitudinal ridges.
The genus is native to the tropical forests of Central and South America, with a range spanning Costa Rica and Panama through Colombia, Ecuador, Peru, Bolivia, Venezuela, the Guianas (Guyana, Suriname, French Guiana), and Brazil, where it occurs across several regions from the north to the southeast of the country.
Distribution
Couratari is native to tropical Central and South America, ranging from Costa Rica and Panama south through Colombia, Ecuador, Peru, Bolivia, and Venezuela, into the Guianas and across Brazil (north, northeast, west-central, and southeast regions).
Taxonomy Notes
The genus was first described in 1775 (Aublet, Hist. Pl. Guiane 2: 723) and belongs to family Lecythidaceae, order Ericales. Species counts vary slightly by source (Wikipedia cites 19 accepted species; GBIF's backbone lists 21 descendant taxa), likely reflecting differing checklist vintages rather than a substantive taxonomic disagreement. Fruit morphology (a calyx-derived apical ring) distinguishes Couratari from the closely related genus Cariniana, which instead has longitudinally ridged fruit.
