A beautiful  hybrid with (usually) 8 sharp ribs.
 

Many very different Astrophytum hybrids have been developed involving Onzuka & A. ornatum and are now in cultivation.

The superb feature of some of this hybrids is due to the intersection between the traits of the ancestors and make  them very desirable. The more beautiful the pattern and the markings, the more sought after the plant.  Many of the best have inherited by “ONZUKA” very large, white flecks with V mark. Ribs are sharp usually eight (like in A. ornatum)  and are spineless (or whit very short spines) clearly indicating the relationship with A. myriostigma.
This hybrid are strong growing. The flower are also very beautiful.

Compare with the inverse hybrid  which is similar but with spines. Astrophytum hybrid OR-ONZ

Photo of  Astrophytum hybrids:

• A. hybrid AS-CAP (asterias x capricorne)
• A. hybrid AS-CO (asterias x coahuilense)
• A. hybrid AS-ONZ (asterias x ONZUKA)
• A. hybrid AS-SEN(AU) (asterias x senilis aureum)
• A. hybrid CAP-AS (capricorne x asterias)
• A. hybrid CAP-AS green  (capricorne x asterias green)
• A. hybrid CAP-SK (capricorne x SUPERKABUTO)
• A. hybrid CO-AS (capricorne x asterias)
• A. hybrid cv. CURLYSPINE
• A. hybrid MY-OR (myriostigma x ornatum)
• A. hybrid ONZ-AS (ONZUKA x asterias)
• A. hybrid ONZ-SK  (ONZUKA x SUPERKABUTO)
• A. hybrid ONZ-SK variegated & albinos forms (ONZUKA x SUPERKABUTO)
• A. hybrid ONZ-OR (ONZUKA x ornatum)
• A. hybrid OR-MY (ornatum x myriostigma)
• A. hybrid OR-ONZ (ornatum x onzuka)
• A. hybrid SEN-AS rosa (senilis x asterias nudum)
• A. hybrid SEN-SK (senilis x SUPERKABUTO)
• A. hybrid SEN(AU)-AS (senilis aureum x asterias)
• A. hybrid SK-CAP (SUPERKABUTO x capricorne)
• A. hybrid SK-CO (SUPERKABUTO x coahuilense)
• A. hybrid SK Multi-hybrid (SUPERKABUTO multiple interbreedings)
• A. hybrid SK Multi-hybrid variegated & albinos forms (SUPERKABUTO multiple interbreedings)

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Plants obtained by controlled pollination of     ♀Astrophytum myriostigma cv. ONZUKA
x ♂Astrophytum ornatum

Origin:  Garden origin (Nursery produced cultivar)

Conservation status: Listed in CITES appendix 2.

A F2 hybrid (spines are come into view again)