None of the commonly extracted plants contain 5-meo-dmt. In fact this is still one of the issues we as a community have been trying to solve, to find a reliable 5-meo-dmt plant source.

In the case we did find a plant that had it, to differentiate between 5-meo-dmt and dmt you can use a tlc kit (click my signature link) or even just ehrlich reagent could already differentiate, check the reagent video database linked in the tlc subforum here for high definition videos showing the difference between 5-meo-dmt and nn dmt