One of my favorites, Usnea ssp. is a lichen that is revered for its antibacterial properties and its ability to clear multiple types of infection. Since it’s classified as a lichen, it’s not technically a plant or herb, but is a half algae and half fungus
How to Make Dandelion Salve - Montana Homesteader How to Make Natural Healing Dandelion Salve Recipe This wonderful step by step tutorial of how to make a natural healing dandelion salve recipe can be used to relieve pain in sore muscles.
I'd still be afraid to collect mushrooms myself: Edible fungi chart. If the world is ever covered in darkness, the only plants that will grow without sunlight are mushrooms. Stick this in your survival guide!