Description: This rare Japaese cultivar is unmistakable for its
pointed tubercles along the ribs edges, in fact its areoles stick out
with large notches between them, giving them a saw tooth look. The
furrows which appear transversely on the ribs cuts the continuity of the
ribs and the plants appears decorated with a geometrical design which is
raised above the surface. When viewed from above these plants resemble a
tortoise-shell hence the Japanese word 'Kitsu-kow' that
means "Turtle shell" but at a first glace (especially the
nude form) resembles some chinned cacti particularly some
Gymocalyciums. Usually the young seedlings appears nothing
special and looks like normal myriostigma, and barely shows any trace of
saw teeth, but they start to produce the distinguishing indentation and
turn into an amazing adult as they get 3 to 7 years old. In general the
bigger the "saw teeth" are and the rounder and flatter they are, the
better. All species of Astrophytum (excluded
A. caput-medusae) have their particular "kikko"
Stem: Pentagonal to almost spherical, dimension 22-40 cm tall, 5-10
cm in diameter.
Ribs: Usually 5.
Flowers: Like those of the well known
Blooming season: Spring to summer.