I always assumed that my plants were registered when I started growing daylilies. I was quite surprised how many I had that were named but unregistered when I looked them up (after I became serious about my addiction). Some where actual homonyms (the same name as registered cultivars), which was incredibly confusing. To sort some of them out, I had to actually write to breeders because the plants were similar. Interestingly, some thought registration didn't make a difference with their customers and didn't care. And some were very bitter because they thought that the same (unregistered) name was being used to rip off them and their registered cultivar.