This strongly-flavored herb is commonly used in Mexican bean dishes, partly because it's supposed to reduce flatulence. Fresh epazote has dark green leaves with serrated edges. If you can't find it, the dried version is an acceptable substitute.
These green or purple flat pods contain seeds that impart an unusual, garlicky flavor to Mexican dishes. The seeds are terrific with scrambled eggs or beans, but they have a reputation for causing flatulence.