Chloropyllum- not worth the risk

Chorophyllum rochodes* is a known as the shaggy parasol mushroom and is classed as edible.  There are many other mushrooms of similar appearance, however and I strongly discourage people from eating this genus or any of the related ones, such as Lepiota.   The risk of fatal poisoning due to a mistaken identity is real and the consequences too awful to contemplate.

There are in addition many reports of people eating supposedly edible species in this group and one person has been violently ill while the other has not been affected.

edit 17/04/2016  The specimen pictured above is Chlorophyllum brunneum.

Another member of the genus, Chlorophyllum molybdites (below) has a very similar appearance, but instead of white gills, they are feintly green.  It is not a deadly mushroom, but it may make you very sick and is a common cause of mushroom poisoning in North America. The nature of the poison in this mushroom was a mystery for a long time, particularly since it doesn’t affect all people at all times.  It was revealed in 2012 to be a  protein called molybdophyllysin by Yamada et al.  This protein is similar in structure to components of some other fungi and bacteria, but the other compounds are not toxic. It is heat labile, beginning to break down at 70 degrees, which may explain why some people, including the Cribbs report having eaten C. molybdites with0ut ill effect.

I won’t elaborate further in the identification of these mushrooms, since I do not advocate even considering them for consumption.  And that says something!

As a footnote, there is a report of the effects of eating this mushroom in the Medical Journal of Australia, by local academic Lindsay Mollison. I note that his report is in December 2011 and that he speaks of doing an extensive internet search to find out what he had eaten.   Perhaps his experience was just prior to when I made this original post in July 2011.  A shame.

*A paper by Vellinga in 2003 revises Chlorophyllum and Macrolepiota in Australia.  She says that we don’t have Chlorophyllum rachodes in Australia, but a similar species dubbed C. nothorachodes.  Although her paper does help to sort out the state of the species in Australia, recent evidence suggests that her survey is not complete.

6 Responses so far »

  1. 1

    Le Loup said,

    Good post. Totally agree.
    Keith.

  2. 2

    Glenda said,

    Hi Morrie, As I have said before, I love your site. I just picked a whole bowl of those guys with the green gills. Off to the bin they go!!

  3. 3

    Jonathan said,

    Well, I guess this exchange is a bit old so may not be read. But this autumn I have been picking kilos of the Shaggy parasol growing in Parkville (VIC) on woodchips, drying most for later but having some fried in butter. Nice. Greenish shades can even appear, say at the junction of stem and gills, but the key is the reddish-brown bruising. Hard to know whether association with ill effects are due to confusion with molybdites or not…but certainly there is enough association of ill effects with Shaggy parasols especially when eaten raw and/or to “go in slowly”. Certainly it seems that most people have no ill effects when well cooked.

  4. 4

    morrie2 said,

    Thanks Jonathan. I have been meaning to update this post. The specimen in the image above is most likely C. brunneum rather than rochodes. You can see that from the distinct flat region on the top of the bulb. C. rachodes has a more gradual transition into the bulb. A lady who has a lot of these sent me some samples recently.

    Although the proportion of people who react to these seems small, I have read that it is extremely unpleasant.

    • 5

      Jonathan said,

      Hi Morrie2.

      Update on edibility. I have collected several kilograms of L. rhacodes and tried them both cooked normally and after drying, incorporated into a delicious risotto al fungi.

      HOWEVER, I have to report that eating anything but a small portion, even after extensive cooking there is a definite slight unpleasant stomach feeling. I am known for a cast-iron stomach so in others I can imagine the response could be a lot worse..

      In short, a little chastened, I too advise against eating this mushroom in any form. Many years ago I was once nauseous when I had a large breakfast of these in Tasmania, but I put it down to too much butter in the cooking. But it was the mushrooms.


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