GRIN. Taxonomical details, with common names, distribution, and synonyms.
Links for Lilium regale
Annie's Annuals - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 3-10) (2 photos)
BBC Gardening - Plant profile with horticultural details and garden uses. (1 photo)
Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zones 3a-8b) (17 photos)
Kemper Center - Plantfinder page for one of the plants growing at the Missouri Botanical Garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 4 to 8) (1 photo). Also a page for Album.
Rob's Plants: Lilium regale 'Album' - Plant profile with basic horticultural information and often personal observations. Also seed germination records.
(2 photos)