Frailea schilinzkyana subsp. concepcionensis
Frailea schilinzkyana subsp. concepcionensis in Succulenta (Netherlands) 74(3): 131. 1995 sec. Hunt 20061
- ≡Frailea concepcionensis in Succulenta (Netherlands) 50(3): 49. 1971 syn. sec. Hunt 20061
- =Frailea angelicana in Kakteen And. Sukk. 64: 212. 2013 syn. sec. Kew WCVP (2019)2
- =Frailea piltzii in Succulenta (Netherlands) 96(6): 254. 2017 syn. sec. Metzing 20213
- 3. Metzing, D. 2021: Revisions of Frailea, Gymnocalycium and various other genera. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. http://doi.org/10.3372/wi.51.51208