Myself would say, me personally I am pretty knowledgeable in terms of mushrooms and fungi. I take a spore print, (safest way) and check,study,research. Until I am one hundred percent certain of what I have. Remember, a spore print, is the result of taking a mushroom cap and placing it gill down unto paper, a glass cup put on top will prevent the spores from fleeting. As always, "white and white aint right" which means, A white mushroom, with a white spore print COULD KILL YOU!! It will likely be the deadly Amanita.
I say use, black paper. Cause how else are you going too see a white spore print. Now, the most deadly species of mushroom. From a few which I will show, and tell you, are. The Galarina species of which are G. autumnalis, G. oregonensis, G. unicolor, and G. venenata and "probably more" these fall under a title also known as "little brown mushroom" aka LBM's which are hard too identify small brown mushrooms. Remember when I said, white and white aint right. Well, this also apply's to LBM's.
The spore print is brown, and the mushroom orange to various orangish colors. It is commonly mistaken for a Gymnopilus species which contain the hallucinogen psilocybin
http://en.wikipedia.org/wiki/Galerina
Another species, Remember when I said "white and white aint right" I am referring too the (Destroying Angel) a very toxic mushroom of which is part of the Amanita family. This is the most common, mushroom of which kills. Mistaken for puffballs, or edible species, even a beginner however should know the difference. White gills, white cap/stem. White spore print, is a clear indicator that you have this mushroom or Amanita.
http://en.wikipedia.org/wiki/Destroying_
angel
Mushroom, poisoning is not fun, if you eat a deadly mushroom. The fatal signs will not show, till three plus days. You get sick, upset stomach cramping, nausea,vomiting at the first couple hours you ingest said mushroom. Akin to radiation sickness, there is a one too two day period of feeling better. But in reality, the toxins have already been absorbed in the first few hours, and is now killing your liver and kidney's of which most likely will fail in the two to three days. Followed by death if no treatment is seeked within the week.
All I present, is useful information, and a few pictures of a tasty wild mushroom that I love too eat. But, I want you, the USER too do some research, of characteristics of Agaricus Xanthodermus and toxic species. TO KNOW which can be edible, and harmful. This may sound like school work, but mushroom identification. Is a pleasing hobby.
Now, with all the seriousness pre-disposed, I present too you, Agaricus sp of which only xanthodermus (Agaricus Xanthodermus) is mildly toxic, "gives you cramps and gas" which species (sp) do I present? Well, is it Xanthodermus? No, cause if it was. It would show "something of interest" at the stem, and base of stem. (tell me what it is) so I know that you studied ;)
I present a edible Agaricus, or commonly known as, horse mushroom, meadow mushroom. It is quite tasty and strong flavored. I collected and baked these with some tomato sauce, salsa and cheese on the cap. Kind of like a pizza bagel deal, quite scrumptious.
Pm me if you would like to know more about "other mushrooms"