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!
Limits of humans. i swear i'm not a serial killer i'm just a writer. <-- isn't that basically the same thing. Pinning this for the info AND the comments^^ I'm not a serial killer, I'm a forensic scientist