Chamomile aka Matricaria chamomilla
As a tea it contains antioxidants which may offer a variety of health benefits and reduce your risk of some diseases. It can also help to reduce your stress, improve sleep. digestive health, help regulate blood sugar control, benefit heart health and protect against certain types of cancer! In salve or lotions it is great for a variety of skin issues. It can also be smoked or vapourized.
Here's a great article: