I don't have any concrete data to provide,
but just want to mention that this plant 'spoke' to me several years ago...
I was walking in the woods near my house, and this plant said "Hey You... yeah, YOU! Come here and check me out!"
I was a bit startled, because I'd never been clearly spoken to by a plant that I hadn't yet ingested.
Upon returning home, I looked it up and discovered it to be Lespedeza bicolor, with a probable tryptamine content.
Still haven't gotten around to harvesting any, but I've never had a living plant so directly address me, before or since.
So take that for what it's worth!
Good luck with your research