Grass: if it does have DMT, i don't think anyone on this forum is aware of it (its definitely NOT phalaris.
first tree: could possibly be a mimosoideae (if you are lucky), but the leaves are a little pointy so it could be a rosaceae. i will let one of the experts handle that ID (either way, it is an interesting tree)
second tree: nothing that i recognize.
My wind instrument is the bong
CHANGA IN THE BONGA!
樹