Ninenew synonyms, one neotype and three lectotypifications in Croton are proposed. Croton schomburgkianus A. P. S. Gomes & M. F. Sales is assigned as a new name for C. nervosus Klotzsch. In section Argyroglossum Baill., Croton argyroglossus Baill. and C. micans var. argyroglossus Baill. are synonymized under C. argyrophyllus Kunth, C. alagoensis Müll. Arg. and C. floribundus var. piauhiensis Rizzini are synonymized under C. blanchetianus, C. micans var. pubescens Müll. Arg., Croton argyrophyllus var. pubescens (Klotzsch) Müll. Arg., and C. argyrophyllus var. villosus Müll. Arg. are synonymized under C. schomburgkianus and, C. argyrophylloides Müll. Arg. is synonymized under C. tricolor Klotzsch ex Baill. Finally, C. sonderianus Müll. Arg. is synonymized under C. jacobinensis Baill. in section Lasiogyne Klotzsch.
Croton section Argyroglossum; northeast Brazil; taxonomy