Alan, I am not going to split hairs on it.  I have done sufficient research on these plants and the sources pertaining to them for years.  I can identify them in the field and I collect them as well.  You may remove whatever you feel needs to be removed.  But be aware of the implications of removing a reference to a plant that may hold the cure for cancer and letting people explore this more fully.  Perhaps those statements you are concerned with you can request citiations on.