I found this monster on my lawn in New Hampshire USA, with a pileus that measures about 8.5 inches across. My mother has threatened to eat it unless I can demonstrate that it's poisonous, so any help identifying it would be greatly appreciated. I should mention that the mushroom is a slightly richer more brown than the fluorescent lighting suggests.

My best guess so far is an armillaria of sorts.

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  • 1
    $\begingroup$ I doubt it is an armillaria. They usually grow in groups at the trees or dead strunks and have a darker centre. But being European, I am unfamilair with American species. Depending how fond you are of your mother, I would strongly advise against eating an unidentified mushroom. $\endgroup$
    – RHA
    Sep 4, 2016 at 10:14
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    $\begingroup$ Do not eat any mushroom unless it is fully identified. The results of a mistake can easily be fatal. $\endgroup$
    – mgkrebbs
    Sep 4, 2016 at 21:48
  • $\begingroup$ mgkrebbs is absolutely right. Some more information that might help with the ID is details of substrate it was growing on (or an in situ photo) and a spore print. That may be enough for an expert to ID it. $\endgroup$
    – nicfit
    Sep 6, 2016 at 23:45
  • $\begingroup$ It is so big and beautiful $\endgroup$ Sep 7, 2016 at 7:04
  • $\begingroup$ @mgkrebbs And even photographic evidence is an 'inderect' evidence and could be insufficient. $\endgroup$ Nov 6, 2016 at 6:43

1 Answer 1


This is most likely a member of the genus Amanita, judging by the vellum traces on the cap, remains of a ring (2nd photo, under your thumb), free white gills.

What we are missing for a better id is the base: is there a volva, a bulbous end...? Please dig out your mushrooms instead of cutting them off.

Also, the colour is significant: are there pinkish tinges (-> A. rubescens?) or is it just brown?

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    $\begingroup$ Good shout. It think it looks a lot like Amanita porphyria $\endgroup$
    – Ebbinghaus
    Nov 5, 2016 at 18:17
  • $\begingroup$ I don't recall any pinkish tinges. In any case since I haven't given enough information for an exact id, and the general consensus that it is most likely an Amanita, I will accept this as an answer. Thank you! $\endgroup$ Nov 6, 2016 at 18:47

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