This three-year (12th) addendum to Sander's list of orchid hybrids contains names, parentage, and names of registrant and originator for all orchid hybrids registered between 1 January 2011 and 31 December 2013, nearly 10,000 hybrids. It also includes a master list of all accepted hybrid genera currently in use. The list includes their standard abbreviations and component genera. This has been made possible because all the name changes from Genera Orchidacearum volumes 1 to 6 have now been incorporated.