Another valid synonym is Mammillaria fasiculata, which was misapplied as a synonym in the year1923, but was properly applied in 1895. ...Read More/>
The subspecies 'thornberi' has thicker stems at 1 inch wide and tapered at the base. The soft and hairy radial spines are not a distinction.
The subspecies 'yaquensis' has more fragile stems at 0.6 inches thick with the soft and hairy radial spines being minute.
Another valid synonym is Mammillaria fasiculata, which was misapplied as a synonym in the year1923, but was properly applied in 1895.
...Read More