4.2.9.1. Macropsychanthus scabrus (Rich.) L.P. Queiroz & Snak var. scabrus

Dioclea elliptica R.H. Maxwell, Ann. Missouri Bot. Gard. 77(3): 578. 1990, nom. inval. (nom. nud.).

Note.

Maxwell (1969) proposed the name Dioclea elliptica in his Ph.D. dissertation, using as the type the specimen de la Cruz 3090 from Essequibo, Guyana. That dissertation is not considered an effective publication, however, under ICN Article 30.9 (Turland et al. 2018). It was later published as a synonym of D. scabra by Maxwell (1990), but with no description, thus being a nomen nudum (ICN Art. 38.1, Turland et al. 2018).