There are other examples such as Zeph. candida that has a none seed bearing clone and a seed bearing clone which I have both and have never seen a single seed pod on one and the other produces seeds without any special attention.. Sometimes it is the fact that they have to be pollinated by another variety to produce seeds or pollinated at night such as Habrantus X floyi where the green based is said to be unable to produce seeds. The Cherry Pink named clone produces seeds very easy. I went several years without any seeds from the green based and then this year it bloomed when the hawk moths where out and I had fertile seed pods on numerous plants. Another year will tell if they are crossed or self pollinated and even then because some should look like either parent there should be a lot of diversity. I feel like some rain lilies hybrids have more complex genetics with more then two parents involved. George Now Zone 7b Liberty NC