This seems like good info on T. ventricosa, it doesnt seem like a source of ibogaine.
http://database.prota.or...search.htm&TN=PROTAB~1&QB0=AND&QF0=Species+Code&QI0=Tabernaemontana+ventricosa&RF=Webdisplay
T. divaricata:
http://icmr.nic.in/ijmr/2008/april/0405.pdfstar jasmine (!) supposedly has 0.04% ibogaine in it. I always wonder when I see a plant with those white pinwheel flowers.
I'm very interested in this topic, but I have my doubts as far as finding a potent non iboga source.
Bancopuma I think did a very straightforward STB extraction that seemed efficient, so that seems like a good start for testing material. STB, check for purity, check melting point, etc. using a plant that has a history of internal use is also very reassuring.
EDIT I looked around a bit more and found that Tabernanthe manii has been used long ago to make an ibogaine extract in france. If this is a distinct species it could provide a legal loophole to cultivate and aquire some interesting plants for people in fascist, erm I mean strict, countries. Unfortunately I couldn't find any sources of seeds or plant material.