Cactus / fukuryu-banjyaku

A friend gave me cactus seeds and said they were nudum fukuryu-banjyaku.
I sowed those seeds on 17th July this year.
24 young seedlings were grafted on Pereskiopsis stocks in the beginning of September.
They show various faces, are not nudum only.
The photo is one of them, hakujyou fukuryu-banjyaku, 3 cm diameter.
Banjyaku is the name of Astrophytum hybrid, ornaum x myriostigma.