Matters relating to orchids are probably traced to the CITES treaty. There are a lot of federal laws regarding this. It sounds like a good thing but often fails to provide any actual controls while creating a lot of paper work. I ran across this while researching american ginseng. As I recall, you can collect and sell all you want so long as the paper work gets filled out!
"CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora) is an international agreement between governments. Its aim is to ensure that international trade in specimens of wild animals and plants does not threaten their survival.......
"CITES was drafted as a result of a resolution adopted in 1963 at a meeting of members of IUCN (The World Conservation Union). The
text of the Convention was finally agreed at a meeting of representatives of 80 countries in Washington DC., United States of America, on 3 March 1973, and on 1 July 1975 CITES entered in force." ......
http://www.cites.org/eng/disc/what.shtml
A.F.