Leftwood said:
I haven't heard that pollen-less lilies have longer life. Does that seem to be true? Since most lilies are self infertile, would being pollen-less make a difference?
Now you have me second guessing myself: is L. longiflorum self fertile? I don't think so. 
So why would remove stamens be beneficial? But.... it is closely related to L. formosanum and L. philippinense, and they are self fertile, and perhaps possessing similar genes makes it "try" to fertilize itself in a more meaningful way, and somehow trigger more ethylene production that way (?). I dunno. 
I have l longiflorum and removing pollen does extend flower bloom life, and it's not self fertile. Perhaps pollen on the plant must make it use energy to keep the pollen fresh like some nutrients flowing to it. Hence why picked pollen isn't viable for long unless frozen, it's alive.
I also have pollen less Lily flowers some were in bloom over 3 weeks!
