Many new combinations are needed in Euploca, previously regarded as Heliotropium section Orthostachys, to correspond with results of our forthcoming, world-wide, molecular phylogenetic analysis. We also need these names for our many delta C-13 determinations that identify many Euploca species exhibiting C-4 photosynthesis and show that other Euploca species are not C-4. Here we make the many new combinations required to support these results.