Frailea gracillima subsp. horstii (F.Ritter) P.J.Braun & Esteves in Succulenta (Netherlands) 74(3): 130. 1995
Frailea gracillima subsp. horstii in Succulenta (Netherlands) 74(3): 130. 1995
is new combination for Frailea horstii, Kakteen Südamerika 1: 202. 1979
Frailea gracillima subsp. horstii in Succulenta (Netherlands) 74(3): 130. 1995