Just thought id start a list feel free to add on

Caranantheus roseus: both Ibogain & yohimbine found as minor alkaloids.
Jasminium didymum: Ibogain, Iboxygain in bark.
Tabernaemontana divicarta: Ibogain, & Ibogamine in root bark.
Tabernaemontana orientalis: Ibogain in leaf, stem, bark.
Tabernaemontana pubescence: ibogain,& voacangine in root bark.
Tabernaemontana quadrangulis: Ibogain, 20-hydroxyIbogamine in bark
Trachelosperum asiatic: Ibogain & Iboxygain in bark
Trachelosperum jasminoids (star jasmine): Ibogain & vobasine in bark.