If you’ve decided to backpack through Europe instead of the mountains of Mexico (but why?), you’ll want to know about a few helpful medicinal plants. Tansy is an old-world aster and remedy, used for flavoring beer and stews as well as repelling insects. Rubbing the leaves on the skin provides an effective bug repellent, but tansy can also be used to treat worms. It is said to be poisonous when extracted, but a few leaves are not harmful if ingested.
