1. Asiatic Hybrids
2. Martagon Hybrids
3. Candidum Hybrids
4. American Hybrids
5. Longiflorum Hybrids
6. Trumpet and Aurelian Hybrids
7. Oriental Hybrids
8. Miscellaneous Hybrids(Interdivisional)
Crossing lilies from different divisions resulted in many new and wonderful lilies that are worth trying to grow in the garden.
Dr. Wilbert Ronald along with Lynn Collicut in Canada developed lilies from Asiatic and Trumpet (Asiapets) divisions- Silky Belles, Ivory Belles and Fiery Belles.
Judith Freeman of The Lily Garden in the US developed Seafarer, also an Asiapet.Lynn Collicut bred two lilies from Longiflorum and Trumpet (Longipets) called Easter Morn and Easter Charm.
De Jong Lilies in the Netherlands developed hybrids from Oriental and Asiatic (OA): Sunny Crown, First Crown and Elegant Crown.
Longiflorum-Asiatic(LA),Oriental-Trumpet(OT,Orienpet) and Logiflorum-Oriental(LO)are also interdivisional.
The work of David Sims of USA about Martagons and Asiatics (Martasians) are truly an advancement in the lily hybridization.
There are a lot of LO lilies out there. El Condor, Vandella, Bellsong, Pink Heaven, Chiara, Miyabi and more. One particular variety that I am interested to grow in my garden is the yellow one called Deliana. The first yellow LO I've seen.
Here are some links for additional information.
The Lily Nook
Sequoias of the Lily World