And where do they turn? To fungi, of course. Just as some fungi have evolved to feed off of plants, some plants grab all their snacks from the fungal kingdom. They can't break down matter in the ground to make their own food, but they can make a meal out of an industrious fungus, feeding off of molds and mushrooms that are usually parasites themselves. Yes, in a Revenge of the Plants twist, the fungi that these atypical plants usually favor as a food source tend to be parasites of more conventional photosynthesizing plants.