You could always take one for the team...your own team, that is...

You never know about some of these...not only ambiguity, but also interspecies variability between strains, and all the hybridizing going on.  You will find the occasional diamond in the cactus rough; I've got a hugely potent bridgesii and another hugely potent pach that unless I'd checked them out, I never would have known about them.  In fact, if I were starting a medicinal garden, there would be no point  in growing anything except those two.

So good luck!