4.2.3. Macropsychanthus duckei L.P. Queiroz & Snak nom. nov.

Basionym: Dioclea ferruginea Ducke, Arch. Jard. Bot. Rio de Janeiro 4: 93, pl. 7. 1925. Type: Brazil, Pará, rio Tapajós, lago Quataquara, Ducke in RB 17266 (holotype: RB! in three parts [00616768; 00616767; 00540231]).

Note.

The specific epithet of the basionym Dioclea ferruginea cannot be used to make a new combination in Macropsychanthus because the name M. ferrugineus is already occupied. We propose the new name honouring the botanist A. Ducke who made huge contributions to our knowledge of the Amazon flora and discovered this species.