You shouldn't have to list any parents, and you should be able to register plants that are the result of seedling x seedling crosses. Is the registrar making up his own rules?

That seems to be whats happening by calling the plant a hybrid

I can roughly answer your question based on Hibiscus.

If the particular plant society wants to be recognized by the Royal Horticultural Society, which created the International Code of Nomenclature, yes you definitely need one parent.

For Hibiscus, the Australian Hibiscus Society is recognized by the RHS, the American Hibiscus Society isn't. It has kind of been a feud for a long time with the 2 societies registering Hibiscus. The Australian Society naturally feels all registration should go through them, the American Society doesn't.

that doesnt answer my question on BSI registrations..it has nothing to do with USA or Australia as its international and the only one of its kind

Yes it does. The type of plant is irrelevant.

Why do you ask, HDD? I've never heard of a hybrid having to have at least one parent that is also registered in order to be eligible for registration, if that's what you're saying. Derek WANTS you to register everything, but he doesn't require it. If he put a bunch of strictures on it he'd get even fewer registrations instead of more, so he'll take whatever information he can get. Here are a few exerpts from an email he sent me, maybe this will help clear up the confusion:

"Parentage is not essential. It is better to register than not register. In many cases I doubt the quoted parents because I know the hybridist but do not query this detail."

"I only register hybrids where I have a photo that I can place on file. These records are copied yearly to go into BSI archives as well as to London for the World file of ALL registered cultivars of all plant families."

"I prefer to have photos from the hybridist him/herself or the person naming the new cultivar. I am always on the look out for photos of hybrids registered before 2000 and grandfather them in after trying to confirm their authenticity. If a person names a cultivar but does not register it I treat it as being non-existent the same as taxonomists treat species that have not been described in the proper manner. I call these names Nurserymen's Names or NN. You may notice this is the same as nn which stands for nomen nudum!"