Where does opscenter + oracle clone get its information from?

If I go into the restore/clone oracle database section of Opscenter I can list instances to clone. This is ver 7601 on Linux. Master is same on Solaris.

This list seems to reflect a subset of databases I've backed up. Typically I use OIP in all my environments but when looking at the list of clonable instances, I can only see a subset of my test instances. There are no prodution ones.

It would be useful to find out how this list gets populated; theres something that been obscured here.

Thanks in advance,Jim