Sclerocactus unguispinus var. durangensis (Runge) N.P.Taylor in Bradleya 5: 94. 1987 Sclerocactus unguispinus var. durangensis (Runge) N.P.Taylor in Bradleya 5: 94. 1987is new combination for Echinocactus durangensis Runge in Hamburger Garten- Blumenzeitung 56: 231. 1890Taxon for this nameSclerocactus unguispinus var. durangensis (Runge) N.P.Taylor