Is there a published list of patented plants?
I was not able to find an accessible list of patented plants from the U.S. Patent and Trademark Office, but their website does provide information about plant patents. They also have a bookstore which sells printed “Index of Patents” issued in a particular year. Individual plant breeders may list their patented and patent-pending plants, as this example from PlantHaven shows. The plant breeders Proven Winners also have several informative pages about plant patents.