how many kingdoms are there? edible mushrooms

Fungus for thought

The number of kingdoms of classification varies depending on who you ask.  Furthermore, this number is always changing with advancements in scientific technology and capabilities.  There was a time when there where only two: Plants and Animals.  However, according to multiple sources including Wikipedia-The Free Encyclopedia, there are currently 6 recognized kingdoms of classification: Animalia, Plantae, Fungi, Protista, Archaea and Bacteria.  As you may have guess the one we will be focussing on in this section is: the kingdom Fungi.  

"Mushroom are among the most mysterious of life forms. The ancient Greeks believed they came from Zeus's lightning because the appeared after rains and reproduced and grew inexplicably.  In the Middle Ages, the circular patterns formed by some mushrooms were dubbed "fairy rings" and were thought to be the work of the "little people," who supposedly danced around them at night, performing magic rites.  In the New World some hallucinogenic mushrooms have been called "the food of the gods" and invested with supernatural powers."

-A passage from "National Audubon Society Field Guide to North American Mushrooms" by Gary H. Lincoff and Knopf.