Well, you could always sequence the species, identify plant specific
genitic markers, or splice a ® or © lab or brand marker, make a test
kit and then turn in some competetors, spread some rumors, then go on a
marketing blitz (with the reward money from the competetors) on how
your plants are the only "TRUE VERIFIED" legal plants. Or better yet
put out the story then charge an extra $149.99 for a cut down pregnancy
test with two red lines (sharpy $0.99) and a fancy document.

In other words, It could be done, but who really wants to pay the
millions that it cost to sequence all the plants and decide what is
"fruit of a poison tree"
However proof of guilt is on the goverment.

Jack

The best way to save the wild ones is to grow them at home (legally of
course)