Whilst walking on holiday in Spain I came across this plant (didnt have a camera at time).it had single elongated bell shaped white flowers and had produced seed pods which were apple green some quite large, one I picked and it contained unripened seeds in a central pod with what may eventually be parachute type down as in a dandelion.
It wasnt Jasmin I know what that looks like.
Trachelospermum Jasminoides? ... Cape Jasmine?
I thought from original post was really large flower .. which is why I thought Prudie was correct.
I don't think datura would be any worse than growing Labernum TBH.