Astrophytum hybrid CO-AS
(A. coahuilense x  A. asterias F1 hybrid)

The AS-CO ( A. coahuilense x  A. asteriasF1 hybrid )  Shows intermediate density of hairy scales, while the number of ribs vary from 5 to 8 (usually 5 like in the mother).

Cultivation: Relatively easy to grow. It is sometime seen as a grafted plant but grows very well on its own roots too. Use mineral well permeable substratum with little organic matter (peat, humus). Water sparingly from March till October and keep perfectly dry in winter at temperatures from 5 to 15 degrees centigrade. (but it is Hardy to -7°C for short periods) In the rest period no high atmospheric humidity!! Sun Exposure: Light shade to full sun.

Propagation: They can be propagated easily from seed or graft.
 

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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Origin:  Garden origin (Nursery produced cultivar)

Conservation status: Listed in CITES appendix 2.
 

Compare with the inverse hybrid AS-CO which is similar but with (usually) 7-8 ribs.

Fruit dehisce basally at maturity as in the parents.
 

This plant is an example of crossbreed involving two different Astrophytum species (Astrophytum coahuilense x Astrophytum asterias)  the resulting interspecific F1 hybrid shows intermediate characteristic from both the parents and an epidermis covered by silvery scales.