You are close. A hybrid must have the parent names on the entry form. If the hybrid hasn't been registered yet, it would give the two crosses that created that particular hybrid.
A species doesn't need to have that type of ID because he can only come from the same species. You don't even have to put C. maxima "#1" x maxima "biggie". It would be entered as C. maxima and you check the box that states it is a species.