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It sounds like a mature specimen of this http://en.wikipedia.org/wiki/Calvatia_cyathiformis. If so it is edible and unlikely to be hallucinogenic, but who knows since this mushroom is usually cooked before being eaten it is entirely possible that the raw version could be psychoactive. It should be noted that raw mushroom is kind of indigestible and may cause gastric upset when eaten. The mushroom you describes would be inedible at this point having long since passed its prime and sporelated.
I read somewhere that Native Americans would snort the spores to get the effects. I see this as highly unwise. However perhaps the spores are the psychoactive part. Unlikely but possible I suppose. I wouldn't snort the damn things since I would keep large amounts of fungal spores far away from the warm moist environment of my lungs. But perhaps consuming dried spores orally. Again I don't suggest this, they could be toxic as all hell. But it could be worth looking into, puffballs grow everywhere, they fruit by the hundreds maybe even thousands in the woods here.
I am not an expert, so DO NOT go snorting and or eating puffball spores en mass because some guy on the internet said they might get you high. I don't know what I am talking about, just ideas. I would think however that trying out dried or fresh puffball could be a good starting point. Just remember the chitin in raw mushrooms can cause gastric upset. And never eat a mushroom you haven't identified. Got a mushroom you don't know what it is? Get that fucker identified or toss it. Don't eat it.
-------------------- 10 different Ganoderma species from across the USA