Horridocactus echinus (F.Ritter) Backeb., Descr. Cact. Nov. 3: 7. 1963
Horridocactus echinus, Descr. Cact. Nov. 3: 7. 1963
is new combination for Pyrrhocactus echinus in Taxon 12: 33. 1963
Horridocactus echinus, Descr. Cact. Nov. 3: 7. 1963
Taxon for this name