Lepiota naucina, also known as the fool's funnel or the deadly dapperling, is a poisonous mushroom commonly found in grassy areas and woodlands. It is important to be aware of synonyms for this mushroom to avoid accidental ingestion, as it can cause severe gastrointestinal symptoms and even death. Some common synonyms for Lepiota naucina include Chlorophyllum molybdites, Macrolepiota rhacodes, and Lepiota rhacodes. These mushrooms may look similar to edible species, so it is important to always properly identify any mushroom before consuming it. In case of accidental ingestion, seek medical attention immediately and bring a sample of the mushroom for identification.