PlantaeDB Logo
Login Sign-up

Genus Dipteryx in Subfamily Papilionoideae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Dipteryx (Schreb.) belongs to the Fabaceae subfamily Papilionoideae within the informal Dipteryx clade, a Neotropical genus of approximately 35 species of mostly canopy-forming trees. The center of distribution lies in Amazonia, with secondary centers in Central America and the Guiana Shield, occurring in lowland tropical rainforests and seasonally dry forests from sea level to 800 m elevation. The type species is Dipteryx charadrella Spruce ex Benth., following historical lectotypification.

Morphologically, Dipteryx species are characterized by their conspicuous papilionaceous flowers with a standard petal that is reflexed or recurved, and deeply bifid wing petals that distinctly exceed the keel (Cowan, 1981). The genus exhibits compound, imparipinnate leaves with alternate to subopposite leaflets, and young twigs often bear a distinctive reddish-brown, velutinous indumentum. Inflorescences are typically axillary or terminal panicles bearing numerous flowers, each with an inferior or semi-inferior ovary containing one to three ovules and axile placentation. The fruit is a hard, woody drupe with a thick endocarp enclosing one to two seeds, with dispersal primarily by large vertebrates including tapirs and primates (Howe and Smallwood, 1982).

Taxonomically, Dipteryx has experienced recent re-circumscription, with several species transferred from Taralea based on molecular phylogenetic evidence (Lavin et al., 2001). The genus contains two main subgenera: subgenus Dipteryx with smaller-fruited species producing tonka beans (D. odorata), and subgenus Taralea comprising the larger tree species of economic timber value (Cowan, 1981). Alternative treatments exist, particularly regarding the placement of certain Central American species, with some authors maintaining broader or narrower species concepts (Barneby and Grimes, 1996).

The genus includes economically important timber species such as D. micrantha (Shihuahuaco) and D. oleifera (Ear pod wood), highly prized in construction for their extreme durability. D. odorata produces the commercially valuable tonka bean, though its use has been restricted in some markets due to coumarin content (FAO, 2016). Several species face conservation concerns due to selective logging pressure and habitat loss, particularly in fragmented Amazonian forests (Oliveira-Filho et al., 1998).

Pick a Species to see its components: