Echinomastus unguispinus subsp. durangensis (Runge) U.Guzmán in Cactaceae Syst. Init. 16: 17. 2003
Echinomastus unguispinus subsp. durangensis in Cactaceae Syst. Init. 16: 17. 2003
is new combination for Echinocactus durangensis in Hamburger Garten- Blumenzeitung 56: 231. 1890