Abstract: Thin cell layers from the ovary of Lilium‘Star Gazer’were cultured as explants on MS medium supplemented with BA 2.0 mg·L ^-1 and NAA 0.2 mg·L ^-1 to induce callus and organs. Historical study showed that callus initiated on the edges and the insides of the incisions of adaxial surface and flank of explants, then they formed strumae, club and ovule-like tubers, finally, they developed into organs. There are three types of organogenesis of Lilium‘Star Gazer’s ovary: ①buds formed from the surface of callus; ②roots formed from inside or near the surface of callus; ③buds formed from the surface of callus, while roots formed from the inside of the callus, then they were connected by vascular systems to form whole primary plants.

Key words: Lilium, Ovary, Thin cell layer culture, Organogenesis