Photo and © copyright by Andrea B. (Bologna, Italy)
http://www.cactusfriends.com/Andrea/index.html 
This is a very proliferous Japanese cultivar that produces
 many offsets with showy bands of white spots
 

Description: The stems and lateral branches are finger like1,5-2,5 cm in diameter, up to12 cm tall with bands of white spots. It produces also many tiny flower buds in summer which usually abort and soon fall down. This cultivar tends to be slower growing.

Cultivation: It is frequently seen as a grafted plant but grows very well on its own roots too. Wintering with 5-15 C but hardy to -5° C for a short time. Need full sun or light shade. Grow in a very draining mineral substrate with little organic matter (peat, humus).

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Scientific name:  Astrophytum myriostigma Lemaire
Original description: Cactacearum Genera nova Speciesque novae et omnium in Horto Monvillano cultarum: 4-6 1839

cv. HUBOKI

Origin:  Japan, Garden origin (Nursery produced cultivar)

Conservation status: Listed in CITES appendix 2.

Synonyms:

• A. myriostigma 'columnaris' cv.minima
• A. myriostigma cv. Huboki

Don't confound HOBOKI with HUBUKI:
"HUBUKI" and "HUBOKI" are two very similar cultivars both in the name and in the general appearance, but not the same plant! HUBOKI has white dots that condense at evenly-spaced intervals on the epidermis forming a cloud like decorative design, whilst the dots of HUBUKI are spaced in a more uniform manner.

• A. myriostigma
• A. myriostigma bicostatum
• A. myriostigma columnare
• A. myriostigma cv. FUKURYU (type A)
• A. myriostigma cv. FUKURYU (type B)
• A. myriostigma cv. FUKURYU (type B) nudum variegata.
• A. myriostigma cv. HAKUUN
• A. myriostigma cv. HAKUUN nudum
• A. myriostigma cv. HAKUUN nudum forma cristata
• A. myriostigma cv. HAKUUN tricostatum
• A. myriostigma cv. HUBOKI
• A. myriostigma cv. HUBUKI
• A. myriostigma cv. KIKKO
• A. myriostigma cv. KIKKO nudum
• A. myriostigma cv. LAIMAKE
• A. myriostigma cv. LOTUSLAND
• A. myriostigma maculatus forma cristata
• A. myriostigma multicostatum
• A. myriostigma nudum
• A. myriostigma nudum forma cristata
• A. myriostigma nudum forma variegata
• A. myriostigma nudum cv MAIDEN BLUSH
• A. myriostigma cv. ONZUKA
• A. myriostigma cv. ONZUKA ball type
• A. myriostigma cv. ONZUKA columnare
• A. myriostigma cv. ONZUKA cristata
• A. myriostigma cv. ONZUKA + HAKUUN
• A. myriostigma cv. ONZUKA + KIKKO
• A. myriostigma cv. ONZUKA quadricostatum
• A. myriostigma cv. ONZUKA tricostatum
• A. myriostigma cv. ONZUKA tricostatum + FUKURYU (type A)
• A. myriostigma cv. ONZUKA white form
• A. myriostigma quadricostatum
• A. myriostigma quadricostatum nudum
• A. myriostigma v. strongylogonum
• A. myriostigma v. strongylogonum cv. COSTA
• A. myriostigma tricostatum
• A. myriostigma tricostatum FUKURYU (type A)
• A. myriostigma tricostatum nudum
• A. myriostigma variegatum