Hi,
I've managed to save a few lilium species in the garden from extinction from lily beetle
(L. canadense, michiganense, formosanum pricei, monadelphum, martagon cattinae)--but the ones I did not get around to treating (along with most of the Frits) are now gone.
Lily beetle is even beginning to affect native lilium populations in North America---L. philadelphicum seems to be one of the few it does not affect (yet).
Can anyone offer seed of other species?