Obscure, toxic Amanita proliferating in the US

Be advised that FUNGI Magazine this month has published an article about a little-known species of Amanita that is spreading out across the country from its former range along the Texas Gulf Coast. This large and distinctive mushroom has recently been found far more widely across the Midwest and South, from Kansas to Illinois to Maryland, typically growing on lawns. There does not seem to be any report of it in Arizona yet.

Amanita thiersii normally has a characteristic shaggy appearance, but this flaky surface can be washed away in the rain, making it possible to mistake for young specimens of Agaricus or Lepiota.

Amanita thiersiiThere is speculation that global warming is responsible for the recently observed expansion of its natural range, but nothing in the way of proof.

This is a potentially deadly mushroom, worth knowing and avoiding when you are looking for white-colored edibles.

About Christopher May

Chris is a radiologist in private practice in Scottsdale. He is married to Barbara May, with two grown children, Megan and Nick.
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One Response to Obscure, toxic Amanita proliferating in the US

  1. Cindy Walraven says:

    Hi, I believe we have one of these growing in our rocks on the side of our garage. I would be glad to send you a picture to verify. I live in Chandler, AZ. I can be reached also on my cell 480-465-1752.

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