Notocactus oxycostatus subsp. gracilis (F.Ritter) Lodé in Cact.-Avent. Int. 98(Suppl.): 8. 2013
Notocactus oxycostatus subsp. gracilis in Cact.-Avent. Int. 98(Suppl.): 8. 2013
is new combination for Parodia gracilis in Succulenta (Netherlands) 1964: 23. 1964