Abstract: We carried out the cytological stady on Lilinm lancifolium in genus Lilium plants.Experiments showed that Lilium lancifolium was homotriploid, and its karyotype is 2n=3x=36=9m (SAT)+3sm+3st (SAT)+3st+3t (SAT)+12t+3T.First reported its meiosis of spore mother cell, and discovered the phenomenons of chromosome lags behind at prophase Ⅱ and delay of chromosome removing spin in newly formed spores.In troploid Lilium lancifolium seed, its chromosome is 29 strips, taking 79% and 27 strips taking 14%.meanwhile, the original place, distribution of Lilium lanlifolium were also discussed.

Key words: Lilium lancifolium, Cytology, Lilium