When hearing about a rabbit's foot, licorice, and resurrection, ferns are not usually the first things to come to mind, unless one is interested in the Polypodium, a fern genus found primarily in the New World. Mostly epiphytes (plants growing above the ground, but supported nonparasitically by another plant or object), these ferns are often found growing from tree trunks and limbs, but sometimes on rocks or even dry ground.