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agaricus?


AlBo

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Sorry that I dont have better pics. I will keep the mushroom intact in the future. Joining the board was an after thought after trying to identify this mushroom. I cut the stem to look for yellow bruising and also the cap. It bruises brown slightly as you can see. The smell is similar to Portobello, but I cannot describe it any better. It did not seem inky at all to me. The cap was about 5" in diameter. The stem broke off when I picked it. It appears that the gills were not attached to the stem. Any help with the ID would be great!!!

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it looks like an agaricus but some more information would be helpful. A spore print and type of environment where it was found along with whether it had a ring on the stem and an example of a younger specimen would help. Also what part of the country are you in?

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John, I found it on the edge of a low maintenance road that goes through a field right near some hardwood bottoms. I am in North Dakota and the ground has been wet from recent rains. I did not see any others - no younger specimens. I believe it did have a ring. Notice the dark spot in the middle of the bottom picture. I will certainly do a better job of catching the specimen in its invironment. I did a spore print on that paper towel. It was rather weak (I was anxious).You may notice it in the 4th picture. It looked chocolate brown (same as gills).

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I think with a post-mature specimen such as this one, getting a good species ID proposal is unlikely. For instance, this may be an example of Agaricus arvesis. But in this state the distinctive "cog-wheel" ring/partial veil associated with A. arvensis would have eroded. Also, older Agaricus mushrooms tend to have flesh that darkens a bit. So one may confuse the brownish tinge on the cut flesh with a true staining reaction. One agaricus that stains brownish is A. bernardii (which I doubt this one is). This one may also be a large example of a field agaricus, a species from the A. campestris group. There are also a few woodland species to consider... types which are most common in forest settings but may also appear in open areas.

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