Yet another person who doesn't seem to understand what the word holistic means. How did the natives know about these properties? How did natives use them in treatments. Oh, that's right, you have no clue.
You should probably wait till DaveV2.0 before opening your mouth again.
And I know a few "alternative practitioners" who try desperately to get the attention of Mainstream Medicine to help discover why things work, and can't get their attention.
These days, if you found a tree bark that did something, you'd never get a doctor to admit it - he doesn't get a kickback from Big Tree, after all.