I asked a hibiscus hybridizer about how Texas A&M could have come up with what appears to be 4 completely novel colors in just a few years. I was informed that usually doesn't happen without the use of mutagens - radiation such as X-rays or DNA altering chemicals used on the seeds. Traits that appear in this manner are less likely to be stable than natural mutations. Texas A&M would certainly have access to that technology, but would not be required to report its use.
There is a voluntary international registry for cultivars of all kinds produced by these techniques. I was surprised to see some of the entries. Much more reporting was done in the 70's when it was "new and shiny" and something to brag about. Now with complaints about the use of GMO, it seems the self reporting has become less popular.
Note - mutagenesis is alteration of existing DNA. GMO involves adding new DNA. "Mutagens" in higher doses can be carcinogens (causing cancer). This has been well documented in the early overuse of x-rays in humans.