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4191 Views 7 Replies Last post: May 9, 2011 10:33 AM by Ivan RSS
Ash. Expert
Ash.
Currently Being Moderated

Sep 13, 2010 12:45 AM

Unidentified Agaricus Mushroom?

Hi,

 

I have come across some Agaricus family mushrooms that are growing on wood? I can't seem to find any references to a member of this genus growing in this habitat? Any help would be appreciated in identifying this mushroom. Cap; up to 12 cm across, becoming buff coloured and cracking with age. Stipe; non-bulbous, with a large persistent ring. Gills; pale pink initially then dark brown with age. Flesh turns yellow quickly when handled. Growing on a very old and rotten tree stump, no idea what type of tree.

 

Many thanks.

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Tags: fungus, unidentified, fungi, mushroom, toadstool, agaricus
  • Ash. Expert
    Ash.
    Currently Being Moderated
    Sep 15, 2010 9:56 AM (in response to Ash.)
    Re: Unidentified Agaricus Mushroom?

    Here is a link to some new pictures! I'm also looking at other help with the ID too.....very frustrating as I'm still none the wiser? Can anybody help me with this? Is this is a rare or even a new species based on its habitat?

     

    Thanks again in anticipation.

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    • ivanteage Beginner
      ivanteage
      Currently Being Moderated
      Sep 22, 2010 6:24 PM (in response to Ash.)
      Re: Unidentified Agaricus Mushroom?

      Hi,  I'm not sure if this helps but I found some similar Agaricus mushrooms recently and had lots of trouble getting a positive ID.

       

      If you haven't already - I'd take a look at Agaricus xanthoderma var.lepiotoides and Agaricus moelleri as possible options.

       

      Good luck!

      Ivan

      • Ash. Expert
        Ash.
        Currently Being Moderated
        Sep 23, 2010 8:56 AM (in response to ivanteage)
        Re: Unidentified Agaricus Mushroom?

        Hi Ivan,

         

        Thanks for the reply. Neither of the two you mention grow on wood, in fact no Agaricus grows on wood and this is where my ID issue lies. I'm in the process of drying some specimens to send to the Mycology unit at Kew gardens to see if they can help too. I contacted Roger Phillips and it caused him some interest too! Be exciting if I've discovered a new species, or even a new habitat for an existing one! Were the ones that you found also growing on the stump of a tree too??

         

        Ash.

        • ivanteage Beginner
          ivanteage
          Currently Being Moderated
          Oct 17, 2010 8:03 PM (in response to Ash.)
          Re: Unidentified Agaricus Mushroom?

          Hi Ash,

           

          The mushrooms I was referring to were growing in woodland, and close  to trees, but not directly on wood. I'm wondering if perhaps some  Agaricus that are used to growing on wood debris aren't that fussy and  can grow directly on a stump...? I've attached some pictures here. It looks like from your picture 7 that the stipe is bulbous at the bottom, but I'm not sure how that helps the ID.

          I'd be interested to know what you find out!

           

          Ivan

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          • Ash. Expert
            Ash.
            Currently Being Moderated
            Oct 18, 2010 10:03 AM (in response to ivanteage)
            Re: Unidentified Agaricus Mushroom?

            Hello again Ivan,

             

            One of the pics looks similar. This really has me lost!! I have sent some dried specimens/spore print/photos to the mycology unit at Kew Gardens on the advice of Roger Phillips, as he too was quite interested by this discovery. He has confirmed what I already knew, in that no identified species grows directly on wood itself. If you take a look at these latest pictures (as there has now been 3 separate fruitings since I first posted here) you can see exactly what I mean. As soon as I find out what they are are, I will post something on here.

             

            All the best,

             

            Ash.

            Attachments:
            • Ash. Expert
              Ash.
              Currently Being Moderated
              May 1, 2011 10:40 PM (in response to Ash.)
              Re: Unidentified Agaricus Mushroom?
              Sorry for the delay!! After having experts look at them, and also under a microscope....they are just common 'Yellow Stainers'!!! I have not received any explanation as to why they are growing on wood though, and since asking the experts at Kew about this....no response at all!!
              • Ivan Experienced
                Ivan
                Currently Being Moderated
                May 9, 2011 10:33 AM (in response to Ash.)
                Re: Unidentified Agaricus Mushroom?
                Ah mystery solved, congratulations!  You can see some evidence of the yellow staining in pictures 7 & 8.
                The scaly cap confused me, though I understand that may make it the variation Agaricus xanthoderma var.lepiotoides rather than the standard
                Agaricus xanthoderma yellow stainer.

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