Notocactus scopa f. xiphacanthus (W.R.Abraham) N.Gerloff & Neduchal in Internoto 24: 61. 2003
Notocactus scopa f. xiphacanthus in Internoto 24: 61. 2003
is new combination for Notocactus scopa var. xiphacanthus in Succulenta (Netherlands) 66: 256. 1987