Tonka, baruand cumaru: Nomenclatural overview, typification and updated checklist of Dipteryx(Leguminosae)

The papilionoid legume trees generally known as tonka, baruand cumarucomprise the taxonomically complex genus Dipteryx. In addition to being ecologically important across the neotropical biomes of rain forests and savannas, Dipteryxspecies are valuable sources of timber as well as an array of coumarin products. This genus currently comprises 14 accepted species with a convoluted nomenclatural history. Dipteryxis morphologically recognized by the flattened leaf rachis, asymmetrical leaflets, truly papilionate flowers, and drupaceous fruits. The generic name Dipteryxis conserved against Coumarounaand Taraleasince Taraleais a heterotypic synonym and is accepted here as a distinct entity. We analyzed 65 names and designations that have been associated with Dipteryxand provide all orthographic variants, type localities, one new combination, 10 new lectotypes, one neotype, and one new synonym. Finally, we present an updated checklist of accepted and excluded names in Dipteryx. By highlighting the nomenclatural problems in Dipteryx, we hope the genus can serve as a model of how the typification process of older names linked primarily to Amazonian species should be treated.