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Amanita caesarea
About 5 inches tall. Cap is red at the top fading down to orange, stem is yellow.
A useful thing about that link is that all those pictures were also taken in Georgia, so there's no doubt that they're in your geographical range.
I think the suggestion of A. caesarea is correct. Your picture is of a not completely mature mushroom. The American Caesar's Mushroom might not actually be A. caesarea and there's a lot of related species that may or may not be "true" caesarea. This link has some nice photos of American varieties which closely resemble the one you photographed: http://morelmushroomhunting.com/amanita_...
Still searching. I saw one from your links that looks a lot like it. But the color is off. There were others were I saw this one with the same color but some had wider thinner tops.
Definitely an amanita - I'm leaning toward fulva, or amerifulva. Take a look at the following links.
http://www.eticomm.net/~ret/amanita/spec...
http://www.amanitaceae.org/?Amanita+amer...
http://www.pamushrooms.org/amanitaceae.p... (scroll down to amerifulva and look at the first pic and assume yours has more color than normal - Amanitas vary widely within the same species)
http://en.wikipedia.org/wiki/Amanita_ful...
http://www.mushroomexpert.com/amanita_fu...
http://www.eticomm.net/~ret/amanita/spec...
fungi are amazingly difficult. I have Aurora's big book of mushroom's. I'll check the amanitas when I get home. There are a few without the "spots" which are just remnants of the "egg"
I searched "amanita" on the web. It brought up pictures of red mushrooms with white markings. None of these had white markings. Even the larger ones. I'm finding fungi is just as hard to identify as insects!
Family amanita from the "egg" remains around the stem, but I've never seen one before