Turbinicarpus saueri subsp. knuthianus (Boed.) Lüthy, Cacti CITES Appendix 1: 9. 2001
Turbinicarpus saueri subsp. knuthianus, Cacti CITES Appendix 1: 9. 2001
is new combination for Echinocactus knuthianus in Monatsschr. Deutsch. Kakteen-Ges. 2: 139. 1930