Abstract: The chromosome number and karyotype of four Lilium species with L. fargesii，L.
martagon var. pilosiusculum，L. formosanum and L. wardii included were analyzed. The results indicated
that the karyotype of L. fargesii was 3A，the others were 3B. The karyotype formulae were as the
following：2n = 24 = 4m + 8st（4SAT）+ 12t for L. fargesii，2n = 24 = 4m（4SAT）+10st（2SAT）+ 10t
for L. martagon var. pilosiusculum，2n = 24 = 4m（2SAT）+ 4st + 16t（8SAT）for L. formosanum and，
2n = 24 = 2m（2SAT）+ 2sm + 8st + 12t（2SAT）for L. wardii，and their asymmetry indexes（As. K%）
were 80.54%，81.50%，81.78% and 83.89% respectively.

Key words: Lilium, karyotype, asymmetry index