The following plants are poisonous if eaten:
Azaleas, Buttercups, Daffodils (the bulbs), Eldeberry (the roots), Hyacinth (the bulbs), Hudrangeas (the buds, leaves, and branches), Laurels, Misteltoe, Morning Glories (the seeds), Poinsettias, and Rododendrons.
Plus, you know, Poison Ivy, Poison Oak, and Poison Sumac. Them ain't good, either.
The following plants are actually good for your body:
Aloe (sunburns), Chili Peppers (reduces pain), Eucalyptus (kills germs), Garlic (heals infections), Ginger (helps indigestion), Mint (reduces nausea and indigestion), Roses (rich in Vitamin C), Wormwood (heals parasitic worms), and St. John's Wort (good for the nervous system).