For those wanting to look up the family names of orchids and the crossing that make up the inter-genetic hybrids a good reference is
http://www.orchids.mu/Glossary/Glossary_R.htm
I had some difficulty with the direct link and had to go to the home page and then select glossary to get to the list.
When using the list you can click on any name the is in blue and it will take you to a description and care instruction page that is very useful
The list was 45 pages long when I printed it about 2 years ago and Rdfa was not listed, but it is listed now. That makes me believe it is a very new hybrid.