A. myriostigma nudum is very similar to the other myriostigma, it
only deviate from the well-known typical form for lacking or mostly
white flecks, giving a bright green, blue-green, gray-green or
mauve-green color overall depending on clones.
It is by some considered an extreme form of the subspecies potosinus.
Stem: Spherical to shortly columnar with age. The stems is
smooth and can be over 120 cm tall and 5-10 cm in diameter and are
shaped like a bishop's headpiece or a star.
Ribs: The number of ribs vary from 3 to 8 (usually 5).
Flowers: 5 cm in length, pale-yellow, silk-shining
white-spotted plant, occasionally with an orange gloom.
Blooming season: Spring or early summer, They take up to 6 years
Fruit: Dry, dehisces towards the apex
forming about 5 star shaped lobes. With few seeds.