Eperua oleifera Ducke (1932: 728) var. campestris Ducke (1932: 728)

Fortes, Elenice A. & Mansano, Vidal F., 2022, Untangling nomenclatural issues of some Amazonian trees of Eperua Aubl. (Leguminosae, Detarioideae, Detariae), Phytotaxa 542 (2), pp. 189-198 : 194

Eperua oleifera Ducke (1932: 728) var. campestris Ducke (1932: 728)

Holotype: — BRAZIL: Amazonas : Borba, Rio Madeira, campo arenoso, 17 January 1930, W.A.Ducke s.n. RB23291 (RB sheet I[00539605]!, sheet II[00585835]!, & sheet III[00585836]!; isotypes NY[00004384] image!, P[00835938] image!, R[000028783]!, U[0003232] image!, US[00001150] image!).

Ducke (1932) described E. oleifera var. campestris presenting one of his unnumbered collections and respective RB old acronym and collection number (H. J. B. R. n. 23.291) as type. Additionally, he informed that the RB23291 exsiccate had a duplicate at P. Thus, the collection Ducke s.n. RB23291 at RB is the holotype, and not the collection at R, as incorrectly cited by Cowan (1975).