This guide applies to the Chicago Region and is not complete for other regions. Disclaimer

Guide to Chlorophyllum

Three species in Chicago Region: Chlorophyllum molybdites with green spores, Chlorophyllum rhacodes (formerly Lepiota and Macrolepiota) with white spores, and Chlorophyllum agaricoides (formerly Endoptychum) with brown spores and a gastroid fruitbody that does not open.