Realignments in American Croton (Euphorbiaceae)

Revisional studies in Croton to achieve a more nearly phylogenetic classification necessitate a number of nomenclatural changes.The genera Crotonopsis and Eremocarpus are reduced to sec¬ tions of Croton, and the new names Croton michauxii and C. willdenowii are proposed for the two species of Croton sect.Crotonopsis.For Croton sect.Julocroton, the 25 species accepted are enu¬ merated, including 19 new names or new combi¬ nations.