30. Catnip (Nepeta cataria)
- Medicinal Use: Anxiety, Sleep Disorders
While not the stuff you may feed your cat, the actual Catnip plant can still be eaten too. The name was given to the plant when people began to notice that cats seemed to love the plant. It is one of the few medicinal plants that can grow outdoors just about anywhere in the world too.
It has been seen in multiple European countries as well as places like Australia and New Zealand. The plant is extremely useful when added to things like teas. People seem to love it due to working similarly to a muscle relaxer, so it can obviously help people get some rest or calm down. This also allows it to somewhat treat anxiety, as it simply helps people relax.