Lepiota procera

"These amethystine Russulas range in colour from pinks, reds, and purples under conifers, to olive or violet brown under deciduous trees, to slate violet in shady places, making identification in the field, by colour alone, guesswork even for the experts."

In publication, Pag 96, "Reflections on the Fungaloids" by B.L. Williamson, Ottawa, 1992. ISBN 1-894572-65-3