Abstract
The ovary slice culture method was successfully applied to obtain interspecific hvbrids of Lilium. Ovary disks of Lilium longiflorum were inoculated on a modified MS medium (HAYASHI et al. 1986) on the 40th day after intrastylar pollination with 4 cultivarieties of L, × elegance. A total of 92 ovules germinated in all the combinations, and the regenerated plantlets were found to be interspecific hvbrids based on chromosome studies.