further research has indicated the tetrahydroharman is more easily encountered in the plant world.

Elaeagnus orientates L. = tetrahydroharmane

Elaeagnus spinosa L. = tetrahydroharmane

LEGUMINOSAE

Acacia baileyanna F. v. Muell =    tetrahydroharmane

Acacia complanata A. Cunn. = tetrahydroharmane

Petalostylis labicheoides R. Brown = tetrahydroharmane

Petalostylis labicheoides var. cassioides = tetrahydroharmane, N,N-DMT

and there are some others...

the sources I have found do indicate that there has been some traditional usage of tetrahydroharmane containing plants used as ayahuasca admixtures...

could it be a more readily available source of a thh like molecule?