The book Camellias (1984) , edited by Chang Hung-ta and Bruce Bartholomew, was a very important taxonomic book for the genus Camellia. Now all species (including subsp. and var.) were added to the Database of International Camellia Register. please visit: https://camellia.iflora.cn/Species/Search?q=Camellia%20japonica to search and view those species.