Hi
@Alfor,
Just a thought - if you're after the species data, then the Catalogue of Life (
http://catalogueoflife.org/) does make its data available as a CSV download. You could download the genera you are interested in that way. The CoL doesn't list hybrids, however; you'd have to go to somewhere like the RHS for specific registers of different genera (i.e. orchids, liliums, etc.).
Kind Regards,
Joshua.