noun. genus of widely distributed agarics that have white spores and are poisonous with few exceptions.
1. Noun Phrase Mushroom species can vary wildly, from the spotted amanita muscaria to the edible Lentinula edodes, or shiitake, mushroom. 2. Noun Phrase The death cap doesn't look gaudy like its red-capped relative the amanita muscaria, but is a pale, toady green.