When walking in the woods near home, I encountered what look to be Morel Mushrooms. The Morel Mushrooms sold at the grocery are all an inch or two tall. But these mushrooms were six inches tall and probably eight inches in circumference at the widest point. They look identical to the ones in the grocery except they are HUGE. Are they Morel Mushrooms or some kind of poison look-alike? If they are, are they still edible at that size?