I looked into the laws around shrooms, Here's the best bits I found.
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The Law On Psilocybin Mushrooms...
Psilocybin mushrooms are illegal in every state in the United States except Florida. Florida stands out because of a decision in 1978 in Fiske v Florida by the Florida Supreme Court which ruled that wild-picked psilocybin mushrooms could not be legally considered "containers" of psilocybin and thus would have to be specifically listed in Florida law by the legislature if they meant to make them illegal. Since the Florida legislature has not chosen to change the laws since then, wild Psilocybin mushrooms are presumptively legal to possess in Florida. This does not mean police won't arrest people for possession of even wild mushrooms, but this has been used as a successful defense against such charges.
Psilocybin mushrooms are not specifically named in the U.S. federal scheduling system, however their two primary active chemicals Psilocybin and Psilocin are both Schedule I in the United States. This means they are illegal to manufacture, buy, possess, or distribute (sell, trade or give) without a DEA license. Fresh and dried psilocybin mushrooms are considered containers of Psilocybin and Psilocin, making them illegal to possess as well.
Because spores contain no psilocybin or psilocin, they are legal to sell and possess (in all states except California and Georgia). But in most states, it is illegal to cultivate or propogate spores into mycelium since mycelium generally contains both psilocybin and psilocin.
Some states in the U.S. and some countries have ruled that growing psilocybe mushrooms does not qualify as 'manufacturing' a controlled substance (psilocybin)
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The Law On Amanita Mushrooms...
Amanita muscaria (as well as all other Amanita species) is uncontrolled federally in the United States. This means all parts of the plant and its extracts are legal to cultivate, buy, possess, and distribute (sell, trade or give) without a license or prescription. If sold as a supplement, sales must conform to U.S. supplement laws. If sold for consumption as a food or drug, sales are regulated by the FDA.
Louisiana:
Effective Aug 8, 2005 (signed into law Jun 28, 2005) Louisiana Act No 159 makes 40 plants illegal, including Amanita muscaria, when intended for human consumption. The law specifically excludes the "possession, planting, cultivation, growing, or harvesting" of these plants if used "strictly for aesthetic, landscaping, or decorative purposes." (Text of HLS_05RS-52 and Update June 2005)
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Freedom of Religion...
First Amendment:
"Congress shall make no law respecting an establishment of religion, or prohibiting the free
exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people
peaceably to assemble, and to petition the government for a redress of grievances."
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Gotta know them laws.