Calvente A., Andreata R. H. P., Vieira R. C., Stem anatomy of Rhipsalis (Cactaceae) and its relevance for taxonomy, Plant Systematics and Evolution, 2008, 276(3–4):271-277, doi: 10.1007/s00606-008-0073-4
The corrected article compares stem structure in six Rhipsalis species. Microscopy and histochemical tests revealed differences in stomatal position, epidermal organisation, supporting tissues and mucilage cavities. Epidermal characters provided the most useful distinctions among species.