The 'nicholii' subspecies has 4 to 8 central spines and 8 to 12 radial spines per areole; Pink blooms and dehiscent fruit.
The 'll...Read Moreanuraensis' subspecies has 6 to 11 central spines and 15 to 18 radial spines per areole; The blooms are crimson red and the fruit is indehiscent.
I've seen this growing in the wild on the 'El Camino Del Diablo Trail' (Devils' Highway) that runs between Ajo and Wellton in Arizona through the Cabeza Prieta National Wildlife Refuge.
The 'nicholii' subspecies has 4 to 8 central spines and 8 to 12 radial spines per areole; Pink blooms and dehiscent fruit.
The 'll...Read More