Hi, everyone This isn't an area I profess to be an expert in, but I do have an opinion. I agree with Jim Waddick, these names are so similar than I couldn't remember which is which unless I write down and carry the distinctions. And, I'm better educated in horticulture than most buyers of plants. If registration doesn't prevent confusing two distinct plants, why go to the expense and nuisance of registering plants, and maintaining a registry? Let people call their plants whatever they want, and the names mean whatever they say they mean. It's all too close to that already, even with a registration system. There are all too many nurseries that sell "pink tiger" lilies, that are not pink and have no "tiger" in them, but the seller hopes to benefit by using a name to which the plants have no claim. Ken