I'm familiar with the dangers of Datura, but even those plants have their use. thanks for the advice though.I don't know you at all but that is a very impressive list of some very 'interesting' plant species.
However I would be very skeptical of including any Datura into a garden like this for anything except for the beauty of its fluted flowers, I have seen it chew up and spit out even the most experienced and balanced minds ... some never to return.
My advice is to stay well clear.
Something else you may be interested in for ornamental purposes only of course
Phalaris arundinacea
umm it seems its already on the list ...my mistake
Growing P. arundinacea and P. aquatica is actually native to where I live and there are fields of it.
Are you growing anything interesting?