Eperua bijuga Martius ex Bentham (1870: 226)

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 : 191

Eperua bijuga Martius ex Bentham (1870: 226)

Lectotype (designated by Cowan 1975): — BRAZIL. Pará : In sylvis inundatis ad insulam Marajo, May 1820, C.F.P. Martius s.n. (K[000555103] image!; isolectypes LE[00002232] image!, M[0215266] image!, M[0215267] image!, M[0215268] image!, M[0215270] image!).

Residual syntypes:— BRAZIL. Pará: Habitat in inundatis ad ostia fl. Tocantins et Amazonum ; Provinciae Paraënsis , s.d., C.F.P. Martius s.n. (M[0215265] image!). Crescit in Brasiliae prov. Paraëns. ad Canalem Jabi , 1820, C.F.P. Martius s.n. (M[0215269] image!). Unknown locality, s.d., C.F.P. Martius s.n. (L[1951212] image!) .

Bentham (1870) described E. bijuga based on Martius’ collections from two localities: “insulam Marajo ” and “ostia fl. Tocantins ”. One collection is found at K, one at LE, one at L, and six at M. All collections are from “ Provinciae Paraënsis ”, the current state of Pará, Brazil.Most of them are from “insulam Marajo ” (K, LE, M[0215266], M[0215267], and M[0215268]), one from “ostia fl. Tocantins et Amazonum ” (M[0215265]), and one from ad “ Canalem Jabi ” (M[0215269]). The K exsiccate has a donation stamp “ Herbarium Hookerianum 1867” and a label from Herbarium Regium Monacense (M herbarium). All collections at M have the same label with a stamp “vid Bentham 1869”. Cowan (1975) described the K exsiccate as the holotype and those at M as isotypes. However, the fact that one of the type locations - “ ostia fl. Tocantis et Amazonum ” - is restricted to one of the M exsiccates indicates that Bentham used the M exsiccates to describe E. bijuga . Therefore, these three unnumbered collections of Martius are syntypes, and here we correct Cowan’s use of holotype to lectotype.