Kind of, they can grow from mycelium that is growing in a dead body. Whether that body's a tree, herb, frog, dog or human it can still happen. Fungi, and therefore mushrooms form a larger class of decomposing organisms and many have developed specifically to rot different things such as hardwoods vs. softwoods and others that differentiate between protein containing substances and carbohydrates. The protein or flesh specific ones are split into 2 classes the ammonia fungi and the post-putrefaction fungi.

Thanks for the A3A Bara Mana