Inga pectinata, basionym of Parkia pectinata, from the Río Casiquiare, Venezuela, is synonymized with Dimorphandra cuprea (Leguminosae: Caesalpinioideae: Dimorphandreae)

The type material of Inga pectinata Humb. & Bonpl. ex Willd., which is the basionym of combinations in Acacia, Mimosa and Parkia (all Leguminosae: Caesalpinioideae: Mimoseae), is Bonpland & Humboldt 1167 (B-W, P-Bonpl.), collected near the Río Casiquiare in southern Venezuela in 1800. Both sheets are sterile, each consisting of a bipinnate leaf with disarticulated pinnae that bear small, sessile, narrowly oblong, opposite leaflets with reddish hairs on the abaxial surface. This material is not conspecific with Spruce 2727, the type of P. panurensis Benth. ex H. C. Hopkins from northwestern Amazonian Brazil, although Bentham erroneously placed the Spruce collection in P. pectinata. Despite a superficial similarity to P. barnebyana H. C. Hopkins, which has also been collected near the Río Casiquiare, Bonpland and Humboldt's collection is conspecific with Dimorphandra cuprea Sprague & Sandwith, in D. subg. Pocillum (Caesalpinioideae: Dimorphandreae). The combination D. pectinata (Humb. & Bonpl. ex Willd.) H. C. Hopkins & G. S. da Silva is published, an epitype with flowers is designated, and the names D. cuprea and D. ferruginea Ducke are put into its synonymy. Notes on the distribution and ecology of D. pectinata are accompanied by a list of specimens from Venezuela's Amazonas State. Citation: Hopkins H. C. F. & Silva G. S. da 2025: Inga pectinata, basionym of Parkia pectinata, from the Río Casiquiare, Venezuela is synonymized with Dimorphandra cuprea (Leguminosae: Caesalpinioideae: Dimorphandreae). – Willdenowia 55: 51–6 Version of record first published online on 7 April 2025.