Notocactus scopa var. xiphacanthus W.R.Abraham in Succulenta (Netherlands) 66: 256. 1987
Notocactus scopa var. xiphacanthus in Succulenta (Netherlands) 66: 256. 1987
is basionym for Notocactus scopa f. xiphacanthus in Internoto 24: 61. 2003
Notocactus scopa var. xiphacanthus in Succulenta (Netherlands) 66: 256. 1987
Taxon for this name