Ten cacti traditionally labelled Rebutia compared through exact photographs of cactus flowers and spines. An editorial selection, not a scientific size ranking. Traditional Rebutia names follow the cited photograph sources; some taxa are now placed in Aylostera or Weingartia. Original video contributions CC BY-SA 4.0. Photographs retain their individual licences and attribution listed below. Photograph credits: 1. File:Rebutia albiflora 1.jpg; Otakar Sida; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_albiflora_1.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 2. File:Rebutia arenacea 1e.jpg; Consultaplantas; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Rebutia_arenacea_1e.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 3. File:Rebutia fiebrigii pm.jpg; Peter A. Mansfeld; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_fiebrigii_pm.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 4. File:Rebutia heliosa pm.JPG; Peter A. Mansfeld; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_heliosa_pm.JPG; Whole photograph scaled and fitted, without crop; title and caption bars added. 5. File:Aylostera pseudodeminuta crop.jpg; Original: Marco Wentzel, Deutschland/Germany, MarcoPedia Derived: Peter coxhead; CC BY 4.0; https://creativecommons.org/licenses/by/4.0; https://commons.wikimedia.org/wiki/File:Aylostera_pseudodeminuta_crop.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 6. File:Rebutia minuscula1.jpg; Sida at Czech Wikipedia; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Rebutia_minuscula1.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 7. File:Rebutia muscula 1.jpg; Otakar Sida; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_muscula_1.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 8. File:Rebutia pulvinosa 1.jpg; Otakar Sida; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_pulvinosa_1.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 9. File:Rebutia pygmaea 1.jpg; Otakar Sida; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_pygmaea_1.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added. 10. File:Rebutia steinmannii eucaliptana.jpg; Otakar Sida; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Rebutia_steinmannii_eucaliptana.jpg; Whole photograph scaled and fitted, without crop; title and caption bars added.