Not sure that this is a pure ornatum cultivar (though I got it labeled as 'A. ornatum cv Hakujo).
(https://www.e-aiand.com/kaktusefoorumisse/ormyhakujo017.JPG)
nice plant! many MYOR or ORMY including haku-jo (both fukuryu or not) give origin to multiribs and haku-jo forms
G'morning robinast
This is my cactus, Haku-jo banjyaku.
Banjyaku is an Astrophytum hybrid, ornatum x myriostigma.
The original meaning of banjyaku is a huge rock.
Haku-jo means "white streaks".
(https://box.c.yimg.jp/res/box-s-xos677pzbgareyol3wk3lnrroi-1001?uid=04fb96e0-8b63-4771-a4e9-0fe20761601f&etag=d04156b01382570732527030)
Originally Haku-jo existed only on ornatum which called Haku-jo Hannya.
Hannya is the Japanese name for ornatum. The original meaning of Hannya is a Japanese female demon with a pair of horns.
The mask of Hannya is used for a formal, traditional Japanese dance.
If Haku-jo were on any Astrophytum hybrids, more or less degree of ornatum gene is mixed.
I think your cactus also a Haku-jo banjyaku.
There are Haku-jo but no spines.
Frank
Thank you, Frank! Again, a piece of useful information.
'Hannya' is simply an ordinary A. ornatum (if I got it right) and A. ornatum 'Hannya' therefore only means that the writer actually does not know what 'hannya' means. Exactly like me still yesterday... ;)
G'morning robinast
You are correct.
The name of an ordinary Astrophytum ornatum is Hannya in Japanese.
The writer of the cactus name did not know the meaning of the Hannya.
Your cactus is not an ordinary A. ornatum.
Frank