The plant that I have worked with that grows in my area is Autumn olive, Elaeagnus umbellate .
I can say for certain that it is active indeed .
I have tried a few different extractions from the leaves and bark . I've even made jam from the berries wich are technically fruits because they have only one seed. It's considered an invasive species in my state and it grows everywhere .
I have done alcohol soaks of leaf and bark material . I have made changa blends using it . The most interesting stuff was a manske salt extraction on bark material . It yielded a fine Grey powder that was definitely active. It had a wild synergy with spice and I might even go as far as to say it has its own trip quality by itself. It can have some super weird and sometimes scary effects for sure. The leaves can also be active as well . My feeling is that it's not as refined as Ayahuasca in its effects but still a strong plant teacher more like an untamed wild animal . I think there are some very different varieties of Russian olive out there that I guess have different alkaloid contents. The Autumn olive thats in this area is a prime candidate for some kind of analysis . I've been wanting to have checked out for years now .
The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
Arthur C. Clarke
http://vimeo.com/32001208