Royal Horticultural Society Orchid Register Search. To find the parentage of particular grexes e.g. Cattleya Bob Betts, scroll down to Grex name search. Type Cattleya in the box marked Genus: and Bob Betts in the box marked Grex: then click the search option. Click on the name in the results page to access the information.
To identify any grexes from particular seed and pollen parents scroll back up Parentage search and enter the details in the appropriate boxes.