Catha edulis
Erythroxylum coca
Ephedra sinica
Echinopsis pachanoi
Echinopsis langniformis
Echinopsis peruviana
Lophophora williamsi
Acacia obtusifolia
Psychotria viridis
Banisteriopsis caapi
EDIT: and Tabernanthe iboga
I had a quick look through Google and The Corroboree but couldn't find any answers.
I know this question is very hard to answer.................
so all I'm after is a ballpark figure
Cheers