The flowers are a brilliant red-violet on both subspecies.
The subspecies 'deherdtiana' has 8 or more spirals of tubercles; Over 3...Read More0 radial spines a quarter inch long.
The subspecies 'dodsonii' has 8 or less spirals of tubercles; About 20 radial spines that are up to three-quarters of an inch long.
The flowers are a brilliant red-violet on both subspecies.
The subspecies 'deherdtiana' has 8 or more spirals of tubercles; Over 3...Read More