"Lepiota rachodes
The Shaggy Parasol, rising from its favourite haunt, a compost heap, is also enormous (the largest member of the group was perforce omitted, being too fat for these pages). A choice edible but not to be confused with Lepiota morganii (now Chlorophyllum molybdites), a similar large, scaly-capped fungus, but green spored and very toxic."
In publication, Page 97, "Reflections on the Fungaloids" by B.L. Williamson, Ottawa, 1992. ISBN 1-894572-65-3