The 'prolifera' & 'haitiensis' subspecies have thicker stems (2.5-3 inch) than the 'arachnoidea & 'texana' subspecies (down to 1.6 inch t...Read Morehick).
The subspecies 'prolifera' has cream to pinkish yellow flowers & yellow spines.
The subspecies 'arachnoidea' has fine & thinner central spines & narrower funnel shaped pinkish flowers.
The subspecies 'haitiensis' has cream-white-yellow flowers and more spines than the other subspecies which gives it a whiter appearance.
The subspecies 'texana' has brown & white spines and pinkish flowers.
The 'prolifera' & 'haitiensis' subspecies have thicker stems (2.5-3 inch) than the 'arachnoidea & 'texana' subspecies (down to 1.6 inch t...Read More