Okay, now we're getting somewhere.
Where in Article I, Section 8, or anywhere else in the Constitution, is granted the power for Congress to prohibit the possession of certain kinds of plants or plant products set forth?
Since you agree that otherwise expansive terms are limited by the scope of the Constitution, I trust you can explain how prohibiting possession of certain plants or plant products is within that scope.
“Where in Article I, Section 8, or anywhere else in the Constitution, is granted the power for Congress to prohibit the possession of certain kinds of plants or plant products set forth?”
Where in Article I, Section 8, or anywhere else in the Constitution, is Congress granted the power to prohibit the practice of human sacrifice as a religious ritual?