mushroom Organism that exists parasitically or symbiotically with other living things or grows on dead organic matter.
structure of a mushroom The mushroom is composed of an underground part (mycelium) and an aboveground, often edible part that is also the reproductive organ.
deadly poisonous mushroom Mushroom containing a toxin that, following contact or ingestion, produces serious effects on humans, generally resulting in death.
poisonous mushroom Mushroom containing a toxin that, following contact or ingestion, produces a range of usually nonfatal effects on humans.