RHS Lily Register
Lily Register & Checklist 2007
Kew Plants of the World: Lilium
Royal Botanic Garden Edinburgh Herbarium Catalogue
Flora of China: Lilium
‘Lilies’ in the Flora of China
Native Species of the Genus Lilium and the Closely Related Nomocharis in Yunnan, China
Flora of North America: Lilium
University of California, Berkeley: Jepson Flora
U S Dept of Agriculture, Lilium species distribution maps
Lilium in “Flora of North America”: Mark W Skinner
Flora of Russia: Lilium
Lilies from Russia & FSU (Former Soviet Union)
Flora of Turkey: Lilium
Plants from Turkey – search provides 41 articles on Lilium