Here's some info I found......
Amanita:spp
A genus of mushroom containing a few species famous for their toxicity. There are many edible amanitas, but eating the wrong one can get you into heaps of trouble, not to mention the delerium, vomiting, diarrhea, cramps, liver failure or death.

Ref.Bks Bessete, A.E.1988. Mushrooms of the Adirondacks: A Field Guide. North country books, Inc. Utica, NY. 145p.
Fischer, D.W. and Bessette, A.E.1992. Edible Wild Mushrooms of North America: A Field to Kitchen Guide. University of Texas Press, Austin, TX. 254p.
Jenkins, D.T. 1986. Amanita of North America. Mad River Press Inc. Eureka, CA. 198p.
Lincoff, G.H. 1981. National Audubon Society Field Guide to North American Mushrooms. Alfred A. Knopf, New York, NY. 926p.
Norton, S. 1996. Toxic Effects of Plants. Pp. 841-854. In: Casarett & Doull's Toxicology: The Basic Science of Poisons, Fifth Edition. C.D. Klaassen, Ed. McGraw-Hill Companies, Inc. New York, NY.
Weiland, T., and Faulstich, H. 1983. Peptide Toxins from Amanita. Pp. 585-635. In: Handbook of Natural Toxins, Volume I: Plant and Fungal Toxins. R.F. Keeler and A.T. Tu, Ed. Marcel Dekker, Inc. New York, NY.
Happy Reading!!!
mvh Tony